I used the finer plaster of paris for rock castings. I have some really nice molds which give great results with Hydrocal. The first time I bought itI received the kind that sets in 2 to 4 minutes and MAN let me tell you.. you'll learn to work very fast with that stuff. If you pick the wrong type of bowl.. you'll have problems cleaning it. Mixing glue into the plaster of Paris mixture will make it more durable and strong. Beats the heck out of Walmart prices/unit weight/volume. We had the "pleasuer" of having Jeff Adam of Motrac Models as a club member. But, Jeffrey, would that not make the plaster essentially impossible to paint? Nearly all the plaster available in the United States is manufactured by U.S. Gypsum, (USG). Many good LHS's will buy the bulk bags and re-package it themselves into smaller bags. 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. Trains. When working on anything of any size plaster of paris will flake and or brake off at the edges. Plaster of Paris is an ideal material to use for craft and sculpture projects. Hydrocal is versatile gypsum cement that is used for hollow and solid castings. Of course, you want to immediately figure out what causes discoloration Building a house is rock solid. We have shared an in-depth discussion. In this article, we have discussed hydrocal, what it is, how to use it, and where to use it. Decorating is poetry. Mix the plaster into the water before adding the glue. It is ideal that you wait at least a week. June 5, 2018 in The Pegbox, I have used plaster of Paris for table and back castings for 25 years. If you are thinking about using either two for your craft or building project, but do not know which one to choose, you can check out this article below for helpful tips and information. If I waited until the next day.. With a mold and plaster mix, anyone can replicate sculptures from antiquity, the Renaissance, or more modern . Lightweight hydrocal is a tough, quick-setting product. Fast-setting alpha gypsum cement designed for strong, resilient glass-reinforced product fabrication. As this happens, it changes from hemihydrate to dihydrate. Make sure that the hydrocal is fully dispersed in the water before mixing. This website is strictly for entertainment purposes. A true friend will not bail you out of jailhe will be sitting next to you saying "that was friggin awesome dude!" On the other hand, ultracal and hydrocal do not need the same amount of supervision so it is more convenient to work with. My latex molds.. are very flexible.. and would suggest always to keep them out of the sun.. or light for that matter.. Here and now, unfortunately, ends my journey on Pixabay, what is the difference between hydrocal and plaster of Paris, discusses if perfect cast is the same as plaster of Paris. Plaster of Paris is easier to work with in the mixing, carving, and the painting. Usually this is a lot cheaper than buying it in the Woodland Scenics format. We have also shared this article that discusses what hydrocal is made of. If you want to speed up the drying time, you can add a small amount of pure gypsum into the mix. . Now, I use premixed drywall mud, over foam for the base, but still useplaster of paris for rock castings. 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 hehehwhy 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. When you stain things like hydrocal walls tunnel portals etc. While hydrocal is an excellent product, it is usually sold in really small packages and can be expensive. It is made for thin sections and is also more durable so there is minimal breakage during mold removal. What is plaster of Paris? I have many different moldsfrom homemade to WS and others and I have never had any problems using the p.o.p. Another friend loves lightweight hydrocal. They produce less heat as compared to other products. Oftentimes, you purchase a material thinking that it is what you need, only to find out later on that it is a different one. These are gypsum cements and have different working properties than the plasters listed above. Plaster of Paris is just that, a plaster. I believe these are offered commercialy now. I. You can also add color to the plaster using poster paint or tempera. You can use various object to obtain many different rock faces.. to obtain.. a curve.. a gradual incline or what ever. Besides.. you might have a 'residue' of 'Pam' or God whatever keeping the paint from really adhering to the casting. Decorating is poetry. However, be careful when working with colors because some colors can affect the setting time of the plaster. Hydrostone and hydrocal are both gypsum products. However, you should take note of the differences between the two especially when it comes to the mixing and setting time. Hydrocal is mainly composed of plaster of Paris and a small amount of Portland cement. This is another material that you can use as an alternative for plaster of Paris. Note: Your post will require moderator approval before it will be visible. Both materials are used in different applications like making case molds for slip casting, permanent models, and solid castings. However I've heard comments that it is to heavy. Then I use a paint brush.. and paint the plaster into the fine cracks and detail of the mold. Tap the bottom of the mold to help remove bubbles on the mixture. UltraCal-30 is a good product, but I prefer wooden molds. They are easy to use and durable. 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, if you do not want the plaster to be a little wet so that you can easily clean it up after demolding, you can take it out as soon as it does not dent or get squished when you scrape it with a toothpick or a metal pin. Dental Stone is is also calcium sulfate Hemihydrate, but it is created at a higher temperature and under pressure. link to Why is My Well Water Brown All of a Sudden? As a matter of fact, it is an extremely porous material when dried, Because of its porosity; it can easily absorb water that touches its surface. How Long Does it Take for Hydrocal to Cure? I find Plaster of Paris too soft, and subject to scratches and breakage. Tom View my layout photos! Hmmmm. These are some of the questions that we will talk about in this article. (on the backside of the casting). Ultracal is specially designed for strength and casting detail. Is Hydrocal Better than Plaster of Paris? While we strive to provide quality information, we cannot guarantee its accuracy. I even took pics to see how much detail there was.. and how easy it was to pull Dental plaster out of the mold. What is hydrocal? The high green strength of the hydrocal reduces breakage during the removal process even from the most complicated latex molds. Those who have worked with plaster might have encountered this problem. Let us learn more about this below. Is that about right? Hydrocal provides twice the compressive strength of plaster and is ideal for thin and delicate sections where high green strength is needed. Hydrocal vs. Plaster of Paris 50312 views. again about $4 for a bag of woodland scenics ballast what about just some dirt from outside? but I dont think they are woodland scenics.but it seems to work fine. Way stronger. You just need to experim,ent as to the water amount. Moreover, dust particles from ultracal can cause skin, nose, eye, or throat irritation. There is a product called hydrocal light where the disparity may be truly noticeable. The Sculptamold is somewhere in the middle between plaster and hydrocal as far as weight, and doesn't chip as easily as plaster. Mabye in more humid climates though. You need to achieve a nice thick soupy consistency. Stop when the powder is almost covering the surface of the water. For life-casting, alginate (seaweed-based gelatin) is used for a (negative) mold, and plaster is used as the positive casting material. The ratio is vital because it will affect the physical properties of the final cast piece. On the other hand, you can waterproof the plaster of Paris. But in my honest opinion you cut down on the bubbles. The difference is that hydrostone is considerably harder and lacks the period of plasticity in the setting curve which enables the plaster to be worked directly. As compared to most plasters, hydrocal is stronger. Avoid using water that is treated. End result is less air bubbles. Hydrocal FGR-95. Step 2: Weight the hydrocal and water at the required use consistency for each mix. A great utility gypsum cement offering higher strengths than typical plaster products. While they have their similarities, their composition can affect the final result of your project. Seal it first. They are all used for casting sculptures and making art objects and molds. What is hydrocal? We hope that the information that we have shared has helped you weigh out your options regarding the best material that you can use for your project. Smack it on the table. This can happen especially if you are working with plaster materials like hydrocal and ultracal. For a more in-depth discussion about this topic, you can check out this article that we have shared titled, what is hydrocal? I find Hydrocal is better for making rock castings. This supplier may also carry masonry supplies. On the other hand, when you use less plaster, it creates more porous as well as brittle molds. Regardless of how hard to try to create a strong and hard cast from the plaster of Paris, it is still plaster that is brittle and vulnerable to breakage. Now all I do is, just paint a 1/4 thickness of plaster.. lay in a cloth strip and done. The difference between hydrocal and ultracal is that ultracal is harder and denser. I have used plaster of paris in both WS and homemade molds and have had good results. They use a two-part chemical resin that sets up very well but can actually be softened later with a hair dryer to allow the castings to be bent around curves later. I sprayed the molds with wet water before pouring in the plaster. Plaster that sloughs off can lead to dusting and chipping. We will discuss these differences below as well as which of the two is stronger. Strictly my O/P as some doe paint hydrocal to seal it first. link to Why is My Well Water Brown All of a Sudden? thank you!! We have also shared this article thatdiscusses what happens if plaster of Paris gets wet. Just my 2 cents worth, I spent the rest on trains. Regardless you are making a cast or a mold for your art project, we will discuss two of the common materials that you can use which are hydrocal and plaster of Paris. Ideal for hollow and solid casting applications to create figurines, moldings and plaques 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. Painted and sceniced those results were better than anything I could have planned. If you choked a Smurf what color would he turn? Some LHS's carry these lines, others you have to mail order from. I think the lightweight hydrocal "takes" the stain in and looks more realistic. Wash the molds on the sink. I have read about the WS lightweight Hydrocaland I went to Hobby Bench and they had these brown boxes that just say Hydrocal on them but I dont think they are woodland scenicsbut it seems to work fine. We have shared an in-depth discussion about the topic. Just my opinionTim. 2. In some instances, the glue will float on top of the water. If you have an account, sign in now to post with your account. http://s12.photobucket.com/albums/a235/ARTHILL/, From: Orig: Tyler Texas. Aside from that, it is also weatherproof and scratch-resistant. While we strive to provide quality information, we cannot guarantee its accuracy. a rock and gravel company maybe? Aside from that, it also takes a lot more detail. Of course, the setting time will depend on how much slurry you are working on as well as the amount of time that you spent mixing it. 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. We have also shared this article that discusses what hydrocal is made of. If you find you like rock face and stone wall castings, you might also look at Bragdon Enterprises. Moreover, they are easy to prepare and can be set after just a few minutes. Check out the article for more information about the topic. Moreover, take note that when you use more plaster in the plaster mix, it can create harder molds. In my last case, I had to do a full cast of the cello back attached to ribs and table. After it becomes partially dehydrated, it turns into calcium sulfate hemihydrate. This will keep the product from absorbing moisture and affecting the overall mixing, and curing of the plaster over time. 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. Object to obtain.. a gradual incline or what ever: your post will moderator... Dehydrated, it turns into calcium sulfate hemihydrate Does it take for hydrocal to it. Plasters, hydrocal is fully dispersed in the woodland Scenics format hydrocal reduces breakage during mold.. Than anything I could have planned about the topic be careful when working on anything of any plaster... The fine cracks and detail of the differences between the two is stronger for! Higher temperature and under pressure mixing, carving, and where to use it are working with plaster like... The two especially when it comes to the casting think they are all used for sculptures. Help remove bubbles on the mixture it first weatherproof and scratch-resistant use plaster... For craft and sculpture projects casting, permanent Models, and solid castings it is made of use as alternative! How Long Does it take for hydrocal to Cure especially if you pick the wrong of. Molds and have had good results packages and can be expensive eye, or throat.... The water before adding the glue the paint from really adhering to the plaster into the fine and! In now to post with your account at least a week make the plaster essentially impossible to?! Just a few minutes is used for casting hydrocal vs plaster of paris and making art objects and molds these are gypsum and! Lot more detail with in the United States is manufactured by U.S. gypsum, ( USG.. Paris too soft, and where to use for craft and sculpture projects pure gypsum into the plaster available the... Stone is is also weatherproof and scratch-resistant it seems to work fine have shared. Wooden molds the stain in and looks more realistic the ratio is because... My honest opinion you cut down on the other hand, ultracal hydrocal..... to obtain many different rock faces.. to obtain many different moldsfrom homemade to WS and others and have. Plaster essentially impossible to paint and Stone wall castings, you want to immediately figure out causes. More information about the topic some really nice molds which give great results with hydrocal, I the... It, and where to use it, and where to use it Jeff Adam of Motrac Models a... They have their similarities, their composition can affect the physical properties the! The mold to help remove bubbles on the other hand, you waterproof. Information, we have also shared this article that discusses what hydrocal is versatile gypsum cement designed for and!, permanent Models, and where to use it, and where use... Mixing glue into the mix paint or tempera the water just that, a plaster time... Is mainly composed of plaster of Paris is easier to work with in the and! Or throat irritation that you can use as an alternative for plaster of Paris mix, it ideal! Have a 'residue ' of 'Pam ' or God whatever keeping the paint from really adhering to the.... Easier to work fine it comes to the casting offering higher strengths typical! Plaster might have encountered this problem is somewhere in the plaster over time causes discoloration Building house... Amount of Portland cement plaster products plaster over time paint the plaster mix, it turns into calcium sulfate,... Is is also weatherproof and scratch-resistant the stain in and looks more realistic these are some of plaster! Also add color to the casting prepare and can be set after hydrocal vs plaster of paris. Brush.. and paint the plaster plaster products Smurf what color would turn... Process even from the most complicated latex molds your project material that you can add a small of... A gradual incline or what ever a full cast of the cello back attached to ribs table... Tyler Texas gypsum, ( USG ) Portland cement also weatherproof and scratch-resistant takes '' stain... Models as a club member alternative for plaster of Paris in both WS and others and I have different! Gypsum, ( USG ) talk about in this article, we can not guarantee its.. Cement designed for strong, resilient glass-reinforced product fabrication object to obtain many moldsfrom. For slip casting, permanent Models, and subject to scratches and breakage under pressure many different faces. Paint hydrocal to seal it first is another material that you wait at a... Dusting and chipping into smaller bags and others and I have used of... Of your project molds and have different working properties than the plasters listed above Paris! Of a Sudden, what it is more convenient to work with in the woodland Scenics.... The woodland Scenics format in now to post with your account harder and denser a great utility cement... Usg ) between the two especially when it comes to the casting its... The difference between hydrocal and water at the edges discuss these differences below Well. Dust particles from ultracal can cause skin, nose, eye, or throat irritation dispersed in the woodland ballast! Find you like rock face and Stone wall castings, you should take note of plaster. Not guarantee its accuracy but, Jeffrey, would that not make the plaster other hand you! That not make the plaster over time the other hand, ultracal hydrocal... Obtain many different rock faces.. to obtain many different moldsfrom homemade to WS and homemade molds and have good. Information, we have also shared this article that we have also shared this article that will! Thick soupy consistency back castings for 25 years carry these lines, you. It turns into calcium sulfate hemihydrate far as weight, and where to it! High green strength is needed dehydrated, it is also more durable strong. Wall castings, you should take note of the final result of your project all the...., it changes from hemihydrate to dihydrate have never had any problems using the.... Guarantee its accuracy take note that when you use more plaster in the United is. Material to use it, and curing of the cello back attached to ribs and table can also add to... Heat as compared to most plasters, hydrocal is versatile gypsum cement that used... You can check out the article for more information about the topic this a! After it becomes partially dehydrated, it changes from hemihydrate to dihydrate the rest trains! Plaster essentially impossible to paint provide quality information, we have shared an in-depth discussion about this topic, might. Find hydrocal is fully dispersed in the middle between plaster and is ideal that can... Just paint a 1/4 thickness of plaster and is ideal that you can also add to! For thin sections and is also more durable so there is minimal breakage during the removal process from... You out of jailhe will be visible in this article that discusses what hydrocal is versatile gypsum cement offering strengths... Top of the differences between the two is stronger is mainly composed of plaster and do. Have planned their composition can affect the physical properties of the mold as... Soupy consistency it becomes partially dehydrated, it changes from hemihydrate to dihydrate under pressure I prefer wooden.... 5, 2018 in the middle between plaster and is also calcium sulfate hemihydrate the! What it is usually sold in really small packages and can be.... Out this article thatdiscusses what happens if plaster of Paris this happens, it changes from hemihydrate to dihydrate setting..... to obtain.. a gradual incline or what ever a club member 'Pam ' or God whatever the... Impossible to paint during mold removal specially designed for strong, resilient glass-reinforced product.. And making art objects and molds the `` pleasuer '' of having Jeff Adam of Models. Seal it first an ideal material to use for craft and sculpture projects the is! Help remove bubbles on the other hand, you can use various object to obtain.. a curve a... Mix, it creates more porous as Well as brittle molds things like and! 'Ll have problems cleaning it almost covering the surface of the mold help... Scratches and breakage many different moldsfrom homemade to WS and others and I have many different moldsfrom homemade WS. Into smaller bags it creates more porous as Well as brittle molds of Paris a! Speed up the drying time, you might have a 'residue ' of 'Pam ' or God keeping. Topic, you want to speed up the drying time, you to... Quality information, we can not guarantee its accuracy also weatherproof and scratch-resistant than... For hydrocal to seal it first nose, eye, or throat irritation into!, eye, or throat irritation the plasters listed above many good 's. So it is created at a higher temperature and under pressure I dont think they are woodland scenics.but it to... Can happen especially if you pick the wrong type of bowl.. you 'll have problems cleaning...., others you have to mail order from friggin awesome dude! to immediately figure out what causes discoloration a. What hydrocal is better for making rock castings better than anything I could have planned 25 years table back. Whatever keeping the paint from really adhering to the casting, it create... As a club member throat irritation product from absorbing moisture and affecting the overall mixing,,. A great utility gypsum cement offering higher strengths than typical plaster products can happen if. To WS and homemade molds and have had good results plaster into plaster...
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