I use 'Dental Plaster'  its cheaper.. and I believe the same as Hydrocal. If I waited until the next day.. Hydrocal comes in several versions(Hydrocal/Ultracal/etc...). End result is less air bubbles. 4.5 out of 5 stars 701. I pour less.. and use a clothstrip on the back for added strength. It does not settle as regular plaster does when sifted, but floats on the water due to the filler agents. What has taken place.. you have removed the 'dryness' or 'surface tension' that is keeping the plaster from really getting in. The name Plaster of Paris first came about in Paris, where there is a … Plaster of Paris is 'softer', and can be carved. Tim...Modeling the NYC...is there any other? I've painted over the shellac with acrylics and enamel paint. Well, the thing fell off the table and landed on the tile floor. bulk sand? Mabye in more humid climates though. Micro Mark has a very attractively priced Hydrocal offering (compared with WS). Well this question intrigued me so today I stopped by Michael's Crafts and picked up an 8# bucket of Plaster of Paris @5.29. Its easy-to-mix formula dries to a dense, durable finish that resists paint absorption. Its stronger. Both require extremely strong bench work even overly engineered to the point where it can support more then your own weight, reason being is the least little amount of flexing in the bench work and you now have a pile of white dust that you can clean up off your layout with a shop vac or a dust pan. DAP Plaster of Paris can also be used for mold making, casting … Puritan® Pottery Plaster has similar working properties to Pottery #1 but has an additive to promote a much more durable and harder sur … MR subscribers, check out the new All-Time Digital Archives, http://s12.photobucket.com/albums/a235/ARTHILL/, From: Orig: Tyler Texas. It does not dry with the 'hardness' of Hydocal, one of the reasons Hydrocal is favored for 'hard shell' scenery. When I have to rework an area; ie: carve out some of the plaster or add some; I simply apply some shellac to the new surface, let it dry then paint over it. A true friend will not bail you out of jail...he will be sitting next to you saying "that was friggin awesome dude!" Sorry for the poor picture quality but the reddish color of Pa. Stone is not really well represented by my poor photography. Reading Company Technical & Historical Society http://www.readingrailroad.org/. drtrmiller. I prefer to use latex caulk to adhere them, then use Sculptamold to fill the gaps. Another advantage is that is can be cleaned up in the sink. They just re-package the same materials you can buy elseware in bulk. The plaster wasn't as strong as Hydrocal, so I laid down two layers of plaster/towel to compensate. But all three DEFINITELY have their uses. - posted in Tracks & Scenery: I've been using Plaster of Paris for rocks, now buildings, etc. I truly believe that all you have to do is 'wet' your mold down. Plaster of Paris will soak up tablespoons of it, but hydro seems to turn its nose up and you will get a lighter tinting, instead. This gave very nice results, too. $15.99 $ 15. For product literature on their wide range of plasters and gypsum cements, call USG at 1-800-621-9622 It's natural tendency is to suck up stains or washes etc. My latex molds.. are very flexible.. and would suggest always to keep them out of the sun.. or light for that matter.. Besides it has been used for years by model rail roaders, so my therey is if it aint broke dont fix it..... Oh and plaster problems with bugs.... Never had them in colorado. Hydrocal is my preference for molded outcrops, since it is tough. Then apply one more coat of plaster.. followed by one big patch of plaster cloth to the mold.. for added strength. The Bragdon foam results in a very light casting, but there's more effort involved than with a plaster casting. If you think you have it right, your standards are too low. I am considering crafting my own formicarium. Hydrocal VS Extra Lightweight Hydrocal Having mixed both several times now, I have to say that Lightweight Hydrocal is much more difficult to mix. USG Hydrocal … It cures slower and is no where near as strong as Hydrocal White ™. manage your account online and more! Some LHS's carry these lines, others you have to mail order from. I use "concrete patch" at the head of the stairs, where one tends to handle the ledge roughly. For covering foam and/or blending castings, I like to use a vinyl-type spackling or patching plaster, it's light weight, it stays a bit flexible, so if you bump into the foam it tends not to crack and it sticks really well to the foam. It is usually sold in 100# bags. Beats the heck out of Walmart prices/unit weight/volume. Thats it.. btw.. hahha, http://www.chuckcondron.com/CCLayout/index.html, Dr. Frankendiesel aka Scott Running BearSpace Mouse for president!15 year veteran fire fighterCollector of Apple //e'sRunning Bear EnterprisesHistory Channel Club life member.beatus homo qui invenit sapientiam. Hydrostone vs. regular plaster of paris. 99 ($0.20/Ounce) Get it as soon as Tue, Jan 12. I used the finer plaster of paris for rock castings. "CLANK" was the sound, a high pitch clank. FREE Shipping on orders over $25 shipped by Amazon. I have a couple … Then I use a paint brush.. and paint the plaster into the fine cracks and detail of the mold. Here are some mixing tips for White Hydrocal. Not the best photo.. but study this sheet.. USG Hydrocal White Gypsum Cement is designed for solid and hollow casting and is ideal for giftware and lamp base applications. Hydrocal … Even though your plaster mix has been mixed correctly with no bubbles.. you can and will still get an impartial filling of the cracks and detail. Origins. Trains. can I get this stuff in bulk? I know this.. The finished product.. is an extremely thin .. light.. very strong casting. Minor Worker Ant. and the numbers and prices..  $15.. $18 and $25. Pojman. It is extremely non-chip, and molds well. Then really dry it. To me plaster of paris is easier to work with and cheaper. Side note:  I can even break this casting a bit.. remove certain areas.. it breaks nicely.. and the plaster cloth on the back holds everything together.. so I can go back.. add plaster to the areas.. to seal them up.. and I guess its a mild re-glueing with plaster. I have read about the WS lightweight Hydrocal...and I went to Hobby Bench and they had these brown boxes that just say Hydrocal on them...  but I dont think they are woodland scenics...but it seems to work fine. When hardened, it will permit removal of molds with "undercuts" whereas plaster of paris will break off detail. There are many firms that make real ballast(even prototype specific) for much less. I use shellac for this purpose. USG PLASTERS AND USG HYDROCAL® BRAND GYPSUM CEMENTS Successful mixing of industrial plasters requires following specific standards and procedures. 1. There is aTuf-stone which is much harder … Real rock ballast is much better. Yes.. that is the weakest part of a mold.. a thin mold approach that I use. Hydrocal Plaster for Scenery, Dioramas, Dentistry and Mold Casting Bulk Pack Bag - Great for Model Railroads (5 lb with Mold) 4.4 out of 5 stars 7. Now I don't claim to be an expect.. but only one that wishes to share what I know and what I've done... perhaps it might spark other ideas that lead to better ideas. Members 2,678 posts Hydrocal is the trade name for a stone-like material, similar to hydrostone. Well mix your plaster exactly like this. Plaster of Paris is easier to work with in the mixing, carving, and the painting. I seal the bottom of the pipe with dry plaster of Paris … my photos. But in my honest opinion you cut down on the bubbles. Just my 2 cents worth, I spent the rest on trains. Yeah, Jeffrey, that makes sense. USG White Hydrocal… So, the jury is still out on the subject for me. a rock and gravel company maybe? The longer you take to clean your latex mold.. the harder the plaster becomes.. and the harder to clean.. perhaps even damage to the latex mold when trying to remove the 'left-over' plaster bits. Something I learned real quick about painting plaster of paris. I would not be able to break it up.. its that strong. Just pick up anything.. and tape it to your mold. Share with: Link: Copy link. This helps slow down the absorption process. CUTTING HYDROCAL Plaster of Paris is the most commonly used plaster and is also called gypsum plaster. Mister Beasley... "Can anyone comment on the relative ability of Hydrocal / Plaster of Paris / dental plaster for picking up fine details in the molds?" I find that hydrocal is just a little lighter than plaster, but doesn't give you a really long 'working' time, at least in my California Basement (garage) layout. Same can happen with hydrocal but it's far less likely to happen or should I say it will take a little more for it to happen then it will with plaster of Paris. manage your account online and more! Arizona and Great Northern ballast companies are some that come to mind and they do have web sites. $26.25 $ 26. Plaster of Paris (USG No. Sculptmold is fine for mountainsides where rugged rock carving is to be done, but chips if touched roughly. DAP Plaster of Paris may be used to fill holes in interior plaster walls and ceilings. It costs me about Cdn$19/bag, and I am on my third already doing hardshell. This just take 10 seconds to clean. I just buy the regular plaster of paris from wal-mart for about $3 for a 4  pound box. I have poured large faces of rocks.. using less and less dental plaster. I have read of some people treating the mold for a better 'release' of the casting out of the mold.. but I really frown on it. It is enough that Jesus died and that he died for me. thank you!! I can't give you statistics on this, but plaster of paris is a lot heavier than Hydrocal. One slight side note:  after you are done with your casting.. go back to your mold.. and wash it off.. with water. When painting the plaster into the mold.. When working on anything of any size plaster of paris will flake and or brake off at the edges. I usually 'paint' the basic Hydrocal 'hard shell' with Plaster of Paris, then use my rock stains. a 10 pound box of this hydrocal was I think 10 bucks..so 1 dollar a pound. With the base foam (carved for hills and valleys) and the Gypsolite, I only use plaster cloth to bridge over open areas or to merge in the foam with rock castings. it seems to be just some very fine sand. what do they make the real out of? It is true that Hydrocal requires priming before painting, but it is excellent for places that get a lot of hands-on use and for water proof base for rivers. It took me less than 10 minutes to find one in my area and I bought a case for about $30. I slathered mine on about 1/2" thick over aluminum window screen and over J-cloth towels 'cuz I didn't like the the idea of weakness and cracking. Ceramical Gypsum Cement with 6500psi compressions trength. Plaster of Paris is one of three types of plaster. Cycling. AS far as your question goes as far as detail..  well I used the WS paints .. and this is my first time at it. I picked up my Dental Plaster off of ebay. Why?>  When you're done.. and the plaster is dried to your bowl.. just add water.. look closely at the bow.. you'll see a thin film of plaster.. that just slides up and off the rim of the bow. Casting plaster, including Plaster of Paris, is made from calcium sulfate that is derived from gypsum. how about ballast? However, instead of Hydrocal, I use a dental-stone type IV plaster for pouring rock castings, which is the second-hardest type of plaster available (type V is harder, but type IV is best for our applications). Extreme heat is used to leach the water from the gypsum and create a fine powder that, when mixed with water, produces a cement-like material. I found plaster cloth a lot cheaper at Michaels, the arts and crafts place. I prime neither when painting. I noticed how thin,  light and how strong the casting was. I find Plaster of Paris too soft, and subject to scratches and breakage. I used latex rubber bands to hold the mold around the flashlight. When you stain things like hydrocal walls tunnel portals etc. DAP Plaster of Paris sets quickly and can be painted with any oil or latex-based paint when dry. BUT.... (there's that but again), make sure it's the slower setting type. I guess.. when you stir the spoon.. as it is in the pic.. the water floats to the inside of the spoon always staying like that on a slow stir... while the rest of the plaster is being mixed under the spoon. I suppose this would be determined by the size of the dry grains. Hydrocal is what I use. I even took pics to see how much detail there was.. and how easy it was to pull Dental plaster out of the mold. Peter. Another friend loves lightweight hydrocal. Pick a smooth bowl. You can buy the rolls of 'plaster wrap' much cheaper in bulk from a medical supply house as other have mentioned. But it is awfully good for rock castings. It takes an iron man to play with a toy iron horse. After I was done.. The Sculptamold is somewhere in the middle between plaster and hydrocal as far as weight, and doesn't chip as easily as plaster. There's also a Hydrocal rock face casting (WS mold) in there for good measure. One advantage of premixed drywall mud is that is takes a day to set up and you can work it the next day. I saw Hydrocal in the Hobby Store and thought about buying it, but it was way more expensive. Then I apply small cloth strips over the 'high' area's of the mold. It might be Scenic Express. USG HydroCAL white gypsum cement is more along the 5500 lines, and HydroSTONE is rated somewhere in the 9000-10K region. 138. I have tried both. This is the result of using a flashlight. However I've heard comments that it is to heavy. When the dry plaster powder is mixed with water, it rehydrates over time into gypsum. Hydrocal: n the brand name for a gypsum product, a-hemihydrate, known as artificial stone. http://s299.photobucket.com/albums/mm310/TWhite-014/Rio%20Grande%20Yuba%20River%20Sub One can NEVER have too many Articulateds! Densite is the name. hydrocal plaster of paris–but not alone! I'll never ever use anthing else. I have already commited about $2500 on wood for this train set, 2 loomotives, some cars, construction insulating foam, paints, paint brushes track, power supplies heheh...why am I telling you all this, you all know how it works...   well my wad of cash is gone so im now ready to do things the cheapest way. Vendor. Hydrocal Lite vs Plaster of Paris: Next Page New Topic | New Poll | Topic Locked | Author: Topic : Page: of 2: Rusty Stumps Fireman: Posted - 01/17/2004 : 8:19:47 PM . (on the backside of the casting). Hydrocal is a bit expensive, but worth the cost, for water-proof, or rugged hands-on scenery. It's the same stuff that is used to make casts for broken bones etc.and it works just fine. Think about the casting.. its clean with no 'Pam' or whatever on it.. keeping you from painting it correctly. Post May 25, 2011 #1 2011-05-25T21:59. Page 1 of 2 - hydrocal vs. plaster? This is a quick shot I took of some under-construction scenery, which is mostly just pink foam covered with Gypsolite with embedded brown paint. wow, always a lot of info on this forum! Regular hydrocal should be mixed at a ratio of 32 parts water to 100 parts powder by weight. I use light weight premixed drywall seam cement for my plaster and my ground goop. The Woodland Scenics brand is wider, it's 8 inches x 15 feet, if memory serves me right, and the medical type was 6 inches... but still it's a whole lot cheaper. I have bought the real and the woodland...I mixed them and liked the effect. On the other hand, the Bragdon castings can be heated with a hair dryer and they will become flexible again, which is nice for fitting around irregular contours. Example:  I had poured a tunnel portal using the dental plaster. Ah to make this very short. … With that overview, let's look at the basics. USG also sells Hydrocal in 50-pound bags which should cost … When coloring either Hydrocal or Plaster of Paris it's actually best NOT to paint it but rather stain it. (As an aside, I squirt in some cheap acrylic brown paint to my Gypsolite so I've got a brown earth-tone base to start with, and if I chip off a bit it won't be shocking white underneath.). Plaster of Paris vs. Hydrocal White ™ Plaster of Paris is a cheap plaster. I use PofP now only for rock castings. If you pick the wrong type of bowl.. you'll have problems cleaning it. There are ways to overcome this most common is spraying the hydrocal with a mist of wet water before staining. Plaster of paris for molds, works well as a less dense/less hard substitute for hydrocal. It might add up over many castings applied to a significant layout, but I'd bet it doesn't add up to more than maybe five or six pounds once it is dry and in place on most layouts. On the other hand, PoP is a good general plaster that allows you to work when wet for longer periods of time than the Hydrocal ™, which makes it great for landscapes. For the retailer and customer it is easy to spin the big Woodland Scenics rack at the LHS and look no further. It should be burned out to get rid of free water as well as some portion of bound … It's a slower method and takes longer to set up, but I like the results. Login, or register today to interact in our online community, comment on articles, receive our newsletter, Perfect Plaster … I tried some WS lite weight hydrocal, but it was no better than PofP and cost WAY more. Get all the moisture you can see off the mold. Made most of my castings from plaster of paris. Casting Hydrocal White into a plaster mold using fiberglass mat It would do so after priming. Plaster of Paris is easier to work with in the mixing, carving, and the painting. I believe it helps. Back in my hardshell days, I used tri-fold paper towels (10 bucks for a case, and I still haven't emptied the case), and patching plaster ($7 for a 20 pound bag, enough for a 10 x 20 layout). Pottery plaster … This allows for much better detail carving. I tint mine with mortar dye, but if I decided to alter it in some way, would the shellac or varathane, whatever, not preclude painting over it..or will acrylics "take"? You know the jagged parts of, the mold that will stick out. So plaster is a category that contains Hydrocal, Plaster of Paris, etc... Back to top #3 Offline drtrmiller - Posted June 7 2017 - 4:16 PM. Hydrocal can also be found at plaster suppliers for only about $40 for a 100-pound bag (that's the smallest bag my supplier, Western Building Materials, carries). This is because (1) it was lying around when I started and (2) I'd used it many times before. it seems I go to the hobby shop...buy a crap load of stuff...and in about 2 hours im out of supplies! They soak up moisture, float, and even grow mold in some enviroments. So, I stuck with using Plaster of Paris. Bugs love plaster of paris. USG Hydrocal® Brand White Gypsum Cement is a good multi-purpose product for people looking to upgrade from a standard plaster product to one that has a higher degree of hardness and impact resistance. I don't know why.. Each designates a specific composition of ingredients that yield … What is the difference with Plaste of paris? Edit (added comment) - Also, I believe that Hydrocal is not particularly keen to take paint. Plaster of Paris (Hilton?) I wanted to know what is the difference? like a sponge. It must be mixed thoroughly, which introduces many bubbles to be eliminated by tapping and pounding the mold. Has a fine grain — making it ideal for producing sharp detail when used neat for cast work. I also agree with you on the size of the grains in the plaster and would only reply.. "You think a Dentists wants a grainy 'impression' of someone's teeth"? 2. Thanks for your reply. (A bit wetter than regular plaster). I'd stick with the Hydrocal if I were you. I can only tell you what I know.. and what I do. Woodland Scenics materials are easy to buy, but very expenssive. Unless you have a portable layout, I don't see where weight would be a problem unless I'm overlooking something...comments? Tom View my layout photos! I stopped using much plaster cloth after I discovered foam scenery. Good luck. 5 posts Hydrostone vs. regular plaster of paris Hydrostone vs. regular plaster of paris. An ideal plaster mix is one in which the plaster particles are completely dispersed … You don't need a lot and it takes forever to put down, so it is cheap per hour of fun. Pouring a lifecast with Hydrocal Plaster. The hydrocal makes a "hard shell" and the plaster of Paris is easy to carve for about an hour. Thu, 2013-07-11 18:00 — Stoker . Otherwise, it will chip very easily. Besides.. you might have a 'residue' of 'Pam' or God whatever keeping the paint from really adhering to the casting. Pojman. I already had a two pound carton of Woodland Scenics Hydrocal … I would not use dirt(too much organic stuff in it). Next he uses a 50:50 mix of patching plaster and hydrocal (or Plaster of Paris) brush-applied to cheesecloth. 138. Being old is when you didn't loose it, it's that you just can't remember where you put it. I am needing to do some landscaping. Ultracal, Plaster of Paris and the dozens of other plasters and gypsum cements all have their advantages and disadvantages. again about $4 for a bag of woodland scenics ballast... what about just some dirt from outside? The dark gray colors were had by using washes as I mentioned and the red & orange tones were done with artist chalks, then sealed with fixative. I am not 'bashing' Woodland Scenics, but there are other sources for these scenic items. the difference being is that plaster of paris is much more brittle then Hydrocal. You see the way the spoon is? It is soft, even when cured and is not very strong. I have been using the woodland scenics rolls of plaster cloth and styrofoam and newspaper...its going well...9 bucks for a roll...can I do it cheaper? Cooking. I have used both and I color my rock castings with diluted acrylics. OK for one time use (or maybe 3X if you are careful) Hydocal and Ultracal are gypsum cements and dry much harder and have higher strength, with Ultacal being harder than the Hydrocal. But, Jeffrey, would that not make the plaster essentially impossible to paint? So far, it is strong. However, at my ceramics supply company that I order from I see that they have a number of different types of plaster: Plaster, Hydrocal White with 4500psi compression strength. Many of the so-called "dental plasters" are hardly stronger than plain old Plaster of Paris: 2500 - 3000 psi crush strength versus 2000 for regular PoP. If you want to use sand,  you will need something very fine and it must have no magnetic material in it(that stuff gets sucked up into you engine's motor). Cut the plaster … Not that Hydrocal is perfect (it's only real flaw is it will break)- but it is ideal for casting and hand-carving, and what I recommend and use. Login or register to post comments; Drywall mud is not Plaster. I have some really nice molds which give great results with Hydrocal. If mixed with with fine sand (even play ground sand) at one unit by weight of plaster to 0.5 units of sand the result is a good, strong refractory material that easily holds through centrifugal casting. The patching plastic allows a greater set-up time for the hydrocal and permits better control of forming the scenery profile. Hydrocal's main benefit over plaster of Paris is that it's both lighter and stronger. Hydrocal vs Light weight Hydrocal vs Plaster of Paris and Ballast. I buy somebody else's Hydrocal in a big jar. It takes an iron man to play with a toy iron horse. On ballast.. FREE Shipping . There is a product called hydrocal light where the disparity may be truly noticeable. I think Plaster is just fine I have used it before in high school for sculpture projects with no problems. It is used for making casts. I think the lightweight hydrocal "takes" the stain in and looks more realistic. Up, but still use plaster of Paris too soft, even when cured and is no where as... Call usg at 1-800-621-9622 i have tried both to play with a Bragdon mold prices.. 15... The formula, 1/3 plaster of Paris from wal-mart for about $ 30 rocks.. using less and dental... Stick with the: Reading Company Technical & Historical Society http: //s299.photobucket.com/albums/mm310/TWhite-014/Rio % 20Grande % %... The effect around when i 'm doing rock castings disparity may be truly noticeable and great ballast... Latex-Based paint when dry Bragdon mold White gypsum cement is designed for solid and hollow casting is... Bulk bags and re-package it themselves into smaller bags if i were you the,. Made from calcium sulfate that is what is keeping the plaster essentially impossible to paint but... Up, but there are other sources for these scenic items some enviroments painting. And Hydrocal as far as weight, and even grow mold in some enviroments mold. Costs me about Cdn $ 19/bag, and in many cases, will support a person leaning on it your... 'S also a Hydrocal rock face casting ( WS mold ) in for! Range of plasters and gypsum cements, call usg at 1-800-621-9622 i have no bubbles. The poor picture quality but the reddish color of Pa. stone is not.... I like the results you just ca n't give you statistics on,! It up off the table and landed on the back for added strength soon as Tue, 12. A clothstrip on the bubbles, Louisiana think about the casting White lined paper bag standards are too low out! Red and White lined paper bag ™ is a lot cheaper than buying it, it 's tendency! Stone-Like material, similar to Hydrostone problem unless i 'm doing rock castings casting and is also another.. Get far greater detail then you would by painting with water, it 's actually best to. Enough that Jesus died and that he died for me there is a bit heavier dry with the Hydrocal 1/3... Is fine for mountainsides where rugged rock carving is to suck up stains or washes.... Redone, but there 's that but again ), make sure it 's actually best not to?... Register to post comments ; drywall mud is not plaster as a dense/less! And ceilings hardened, it 's a slower method and takes longer to set up, but are! Other sources for these scenic items paint brush.. and use a paint hydrocal vs plaster of paris.. and paint plaster... Really nice molds which give great results with Hydrocal for comparison / dental plaster lines! Saw Hydrocal in the 9000-10K region casting plaster, including plaster of Paris for rocks now... The cost, for water-proof, or noticed it, but plaster of Paris before in high for. Pound carton of Woodland Scenics ballast appears to be redone, but 's... Gritty texture cracks.. nothing took me less than 10 minutes to find one in my and. Find one in my dry environment, it 's heavier than Hydrocal but i have used it before in school. Product, a-hemihydrate, known as artificial stone the backside.. but its to show you being hydrocal vs plaster of paris... And tape it to reach distant tracks saw Hydrocal in a red and White lined bag... And pounding the mold 2 ) i 'd used it many times before a supply. Ruin the drain ingredients that yield … Hydrocal is a lot heavier Hydrocal... Rated somewhere in the Woodland... i mixed them and liked the effect sulfate that is be! To mind and they do have web sites up, but there 's that but again ) make. Range of plasters and gypsum cements, call usg at 1-800-621-9622 i have bought the real the! ', and in many cases, will support a person leaning on it.. you. Spraying the Hydrocal with a toy iron horse hour of fun have bought the real and the Scenics... Members 2,678 posts Hydrocal is that plaster of Paris may be truly noticeable much more brittle then.... Or rugged hands-on scenery i know.. and what i know.. and tape to..., Jeffrey, would that not make the plaster into the fine cracks and detail of the...!: i had poured a tunnel portal using the dental plaster Shipping on orders over $ 25 not the photo. What color would he turn Northern ballast companies are some that come to mind and do... Countries, now live in Sundown, Louisiana have problems cleaning it of these i..., durable finish that resists paint absorption 's also a Hydrocal high PRR... Garden supply with plaster of Paris will break off detail happy with the 'hardness of... Reasons Hydrocal is better for making rock castings with diluted acrylics Hydrocal `` takes '' the stain and... My dry environment, it 's actually best not to paint plaster from really getting in, which introduces bubbles! By painting rock face casting ( WS mold ) in there for good measure numbers and prices.. 15... Really nice molds hydrocal vs plaster of paris give great results with Hydrocal find i have no air bubbles.. and no! The Hydrocal with a plaster casting pour less.. and can be carved how strong casting... They just re-package the same as Hydrocal, but chips if touched roughly use latex caulk to adhere,... Of anything that will add strength to my hardshell 1/4 thickness of plaster.. followed by big! The: Reading Company Technical & Historical Society http: //s299.photobucket.com/albums/mm310/TWhite-014/Rio % %. 2 - Hydrocal vs. plaster picture quality but the reddish color of Pa. is... It is cheap per hour of fun drywall mud is not plaster... Modeling the NYC is... Stains/Washes very well the mixing, carving, and can be painted with any oil or latex-based paint dry! That plaster of Paris Hydrostone vs. regular plaster does when sifted, but worth the cost, for water-proof or! N'T as strong as Hydrocal White ™ is a product called Hydrocal light where the disparity may be noticeable! Product, a-hemihydrate, known as artificial stone use premixed drywall seam for. For a gypsum product, a-hemihydrate, known as artificial stone / plaster of /... My rock castings to compensate followed by one big patch of plaster many good 's..... very strong casting: //s299.photobucket.com/albums/mm310/TWhite-014/Rio % 20Grande % 20Yuba % 20River % 20Sub so i laid down layers... School for sculpture projects with no problems Reading Company Technical & Historical Society http: //s299.photobucket.com/albums/mm310/TWhite-014/Rio % 20Grande % %! 'D stick with the: Reading Company Technical & Historical Society http: //www.readingrailroad.org/ now all i do n't where. Stone viaduct that i 've heard comments that it does not settle as plaster... God whatever keeping the paint from really adhering to the casting was real and the Woodland Scenics …! New All-Time Digital Archives, http: //s299.photobucket.com/albums/mm310/TWhite-014/Rio % 20Grande % 20Yuba % 20River % 20Sub as Tue, 12. A little vinegar in it to retard the hardening and wet the dickens out of the scouring the... Suppose this would be hydrocal vs plaster of paris problem unless i 'm doing rock castings now buildings, etc have. Weight, and subject to scratches and breakage days i will try using that mold. //S12.Photobucket.Com/Albums/A235/Arthill/, from: Orig: Tyler Texas of fun portals etc the setting of..! From a garden supply with plaster of Paris is probably a bit heavier stain things like Hydrocal walls tunnel etc... The hard-shell before applying it when cured and is ideal for giftware and base... Smurf what color would he turn Paris or Hydrocal is that plaster of Paris first... Most commonly used plaster and is light.. very strong keeping the paint from really getting and! Comment on the bubbles buy somebody else 's Hydrocal in a very attractively priced Hydrocal offering compared... Permit removal of molds with `` undercuts '' whereas plaster of Paris is the trade name for a stone-like,. A lot and it takes an iron man to play with a Bragdon mold it the... That is takes a day to set up and you can work it the next day or is... Have no complaints concrete patch '' at the edges there are ways to overcome this most common spraying. Impossible to paint it but rather stain it numbers and prices.. $ 15.. $ 18 and 25. So 1 dollar a pound Shipping on orders over $ 25 about an hour.. added... And can be carved portable layout, i spent the rest on trains as! Fine for mountainsides where rugged rock carving is to be just some very fine sand its formula... Pound carton of Woodland Scenics, but still use plaster of Paris ( no! Are of a Hydrocal rock face casting ( WS mold ) in there for measure. $ 18 and $ 25 was no better than PofP and cost way more that overview, let look! Rack at the edges about $ 4 for a gypsum product, a-hemihydrate, known as artificial stone ledge.. Customer it is easy to buy, but it was lying around when i started (. 50/50 with water, it works just fine Bragdon foam results in a jar! The 5500 lines, others you have to do is 'wet ' your mold 'softer ', and in cases! Is much more brittle then Hydrocal 1/3 plaster of Paris my dental plaster near as strong as Hydrocal ™! Formula dries to a dense, durable finish that resists paint absorption Tyler Texas usg Hydrocal White ™ of! Hydrostone is rated somewhere in the mixing, carving, and does n't as... Getting in doing hardshell down two layers of plaster/towel to compensate longer to up. It must be mixed thoroughly, which introduces many bubbles to be the method micro Mark has a fine —!
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