1. This can happen especially if you are working with plaster materials like hydrocal and ultracal. It is easy to do especially when you are working with small batches. You can do this by using a gauze bandage, glass fiber, and other suitable materials. Posted 11 May 2017 - 09:42 AM. Wash the molds on the sink. manage your account online and more! Adding either Plaster of Paris or Hyrdocal to make a smooth surface should not be a problem, I have done it both ways lots of times. Excessive amounts can affect the overall drying and curing of the product. After thoroughly mixing the ingredients, you can proceed to the drying. Aside from that, you can easily purchase them at your local hardware store or even online. 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. So, the jury is still out on the subject for me. http://s299.photobucket.com/albums/mm310/TWhite-014/Rio%20Grande%20Yuba%20River%20Sub. 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. The mixed consistency will vary depending on its use. Most drywall muds are designed to shrink up more than platers or hydrocal type products. 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. Check out the article for more information about the topic. can I get this stuff in bulk? The amount of ultracal that is used and its ratio with the water as well as the mixing process can also affect its setting time. There are ways to overcome this most common is spraying the hydrocal with a mist of wet water before staining. Sounds to me like you are buying the WS pre-packaged Hydrocal. Take a Ride on the Reading with the: Wearing gloves is also recommended. To help you get started, we will discuss two of the common plasters used which are hydrocal and plaster of Paris. It is extremely non-chip, and molds well. is this normal? Is Hydrocal stronger than plaster of Paris? I picked it up off the floor.. looked for chips.. cracks.. nothing. Moreover, hydrocal does not slough off as compared to plaster of Paris. Video Lifecasting Tutorial: Mixing Hydrocal Plaster. The castings can set in about 15 to 20 minutes. Leaving the shower curtain open or closed has long been a debate for a lot of people. Bear in mind that when you pour a large amount of slurry directly on the mold, it results in slight densification of the cast. a 10 pound box of this hydrocal was I think 10 bucks..so 1 dollar a pound. I skim-coat my construction-foam base and hills with this, and it gets rid of the flats and gives me a nice rough earth-like finish. Just my 2 cents worth, I spent the rest on trains. Using the mold before it is not ready will result in bubbles formation in your casts. Avoid directly pouring hydrocal into the water. Shake the bubbles out and level of the castings. Do not pour any leftover plaster of Paris down the drain. Below is a step-by-step instruction on how to mix hydrocal. Ultracal can be used in a wide array of applications. I have used plaster of paris in both WS and homemade molds and have had good results. So many choices but so little time. I like the rigid insulation board concept. manage your account online and more! Ultracal is gypsum cement that has low absorption and is usually used for case molds. Order Ascending; Order Descending; willy6. But in short using the hyrdrocal/dental plaster. There's also a Hydrocal rock face casting (WS mold) in there for good measure. It takes an iron man to play with a toy iron horse. During the process, it is ground up into a powder form and then heated. Mix the plaster into the water before adding the glue. Mixing glue into the plaster of Paris mixture will make it more durable and strong. While hydrocal is easier to work with when it comes to posting casting projects, ultracal is more durable. I'll never ever use anthing else. Hydrocal is stronger than plaster but is as easy to use. The answer as to whether or not hydrocal is better than plaster of Paris depends on how you plan to use it. What I like to do w/ that huge bag of Hydrcal is to rebag in smaller more managable amounts. Of course, you want to immediately figure out what causes discoloration Building a house is rock solid. You can make plaster of Paris stringer. We have also shared this article titled, what is the difference between hydrocal and plaster of Paris? I would not use dirt(too much organic stuff in it). Well mix your plaster exactly like this. Hardens like a rock quickly. Hydrocal is stronger as compared to plaster of Paris. 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. Check out the rest of the article below for more tips and ideas. Others are a mix of production offerings and ones created by myself or club members. Used for waste molds or temporary patterns where surface hardness and strength are not important. Now for my last pic.. just a side note.. but someone out there might want to know. Add cup of white glue into the water. . Break down hardened plaster on your working space and clean the area using soap and water. We have also learned the difference between a hydrocal and plaster of Paris. We have shared helpful tips and ideas that you can refer to. To help you get started, we will discuss the differences between both materials below. This website is strictly for entertainment purposes. Leaving the shower curtain open or closed has long been a debate for a lot of people. As a result, the ultracal hardens and slowly becomes hot and highly alkaline. Then really dry it. I don't know why.. I also use Gypsolite (LHS, same big jar) which has a nice gritty texture. Usually this is a lot cheaper than buying it in the Woodland Scenics format. You can post now and register later. These are some of the questions that we will discuss in this article. All these castings are pre colored. It is enough that Jesus died and that he died for me. Your results and mileage may be different, of course. I picked up my Dental Plaster off of ebay. Beats the heck out of Walmart prices/unit weight/volume. Hydrocal and ultracal have high performance. I already had a two pound carton of Woodland Scenics Hydrocal Lite at $8.49. I use less plaster.. pour a thinner mold.. and is light.. but strong. In this article, we will discuss the difference between hydrocal and plaster of Paris. Moreover, warm water is used to speed up the setting time. I'm in agreement with Walace also. It consists of a fine white powder that hardens when moistened and dried. The first thing that you need to do is to prepare the mix. I would not be able to breakit up.. its that strong. I can't give you statistics on this, but plaster of paris is a lot heavier than Hydrocal. For rocks and structures for a slot layout though regular plaster is probably OK. Save. UltraCal-30 is just plain old plaster of paris, with some portland cement, usually in a 8:1 ratio, so you can make your own from a trip to the local hardware store. Adding glue to the mixture can make the plaster of Paris stronger. Ultracal is stringer and harder as compared to hydrocal. Thicker batches will set faster and can be used for direct application to semi-hardened or bond hardened castings or for fill-in scenery. I often do this even with closed cell foam just to make it a little more slippery. The reason for this is that the chemicals in the water can create unwanted reactions when it is mixed with the plaster. Wear proper clothing and protective gear like gloves, goggles, and a face mask when working with ultracal. Cuts easily, pulls away from the castwell, and you can get a very nice, tight, outline of the instrument every time. What is the difference between hydrocal and plaster of Paris? What is hydrocal? Smooth out any bubbles that you can find using a skim coat of a watery mixture once it has completely dried. You can also check out this article that we have shared titled, what is the difference between hydrocal and plaster of Paris? It is soft, even when cured and is not very strong. When working on anything of any size plaster of paris will flake and or brake off at the edges. Aside from that, it is also weatherproof and scratch-resistant. What Can I Use Instead of Plaster of Paris? Grinding is a cave mans job, even the most simple tools will do. Login, or register today to interact in our online community, comment on articles, receive our newsletter, To test if the plaster cast can be safely removed from the mold without deforming it, scratch the surface gently using a metal pin or your fingernail. Be careful about spilling the plaster dust, as it is a pain to get it up without it blowing . The plaster of paris has a grittier finish to it, losing some of the detail of the mold. 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. If the plaster has not thoroughly cured, it will feel cold to the touch. A great utility gypsum cement offering higher strengths than typical plaster products. Then apply one more coat of plaster.. followed by one big patch of plaster cloth to the mold.. for added strength. Hydrocal and plaster of Paris are two of the common materials used in casting, molding, and crafts, but is there a difference between the two? Dilute the detergent by spraying the mold with straight tap water. There are many firms that make real ballast(even prototype specific) for much less. On the other hand, you can waterproof the plaster of Paris. I buy it 500 pounds at a time for my business. You can mechanically mix hydrocal by batch and continuous processes. We will discuss these differences below as well as which of the two is stronger. If you pick the wrong type of bowl.. you'll have problems cleaning it. Moreover, they are easy to prepare and can be set after just a few minutes. These are gypsum cements and have different working properties than the plasters listed above. Thank you for reading! It is made for thin sections and is also more durable so there is minimal breakage during mold removal. When hardened, it will permit removal of molds with "undercuts" whereas plaster of paris will break off detail. Check out the video to learn more about the topic. I find Plaster of Paris too soft, and subject to scratches and breakage. Some would agree that closing the curtain after taking the shower is necessary to keep it dry while others Why is My Well Water Brown All of a Sudden? Aside from that, hydrocal also takes more detail and does not slough off. Hydrocal vs. Plaster of Paris 50312 views. Brick In The Yard Mold Supply shared the video below on YouTube. This material is specially designed for making thin sections. Paste as plain text instead, 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. Take note that there is a difference between the setup time and the curing time. You can check out the video below for the step-by-step tutorial. Just my opinionTim. thank you!! Step 2: Weight the hydrocal and water at the required use consistency for each mix. This product although not reat for casting works wonders for all otrher plastering jobs on the layout. Product Details. Use acrylic washes to color castings, repeating until satisfied. When mixed with water, a setting reaction takes place where the water recombines with the particles of the calcium sulfate. Always do your own research before making important decisions. Like any other gypsum product, hydrocal will vary slightly from batch to batch as far as the amount of water required for mixing. Always do your own research before making important decisions. Hydrocal is made for making solid and hollow castings. The plaster wasn't as strong as Hydrocal, so I laid down two layers of plaster/towel to compensate. You can heat ultracal, but you need to follow heating instructions. Ultracal is just plaster of paris (calcium sulfate Hemihydrate) with portland cement and crystalline silica added. Lived in seven countries, now live in Sundown, Louisiana. link to Should You Leave Your Shower Curtain Open or Closed? When it comes to demolding the cast, you need to wait a couple of hours before you demold. Take note that variations in the temperatures of the slurry affect the setting time, so you must keep water and hydrocal at a stable temperature before using. This will prevent air bubbles and will also create a uniform and smooth surface. I have been using Hydrocal to make rocks out of my Woodland Scenic rubber molds, but it gets expensive after a while. After it becomes partially dehydrated, it turns into calcium sulfate hemihydrate. It is used for crafting as well as a construction material. Video Casting Hydrocal White into a Plaster Mold. Plaster of Paris is just that, a plaster. How you mix the plaster will affect the outcome of your cast. In this dehydrated state, it can be used as an ingredient in plaster. It would do so after priming. Leaving the shower curtain open or closed has long been a debate for a lot of people. Avoid pouring all the powder into the water. Generally, the crystals form a structure in the plaster that provides it strength. Hydrocal provides twice the compressive strength of plaster and is ideal for thin and delicate sections where high green strength is needed. 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. I'm also a hydrocal fan for plaster casting. I used latex rubber bands to hold the mold around the flashlight. I use a 2 to 1 ratio in my plaster of paris mixture. You can also check out this article thatdiscusses if plaster of Paris is flammable. 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. What is the difference with Plaste of paris? Besides.. you might have a 'residue' of 'Pam' or God whatever keeping the paint from really adhering to the casting. You can also check out this article that we have shared that discusses what the difference is between hydrocal and ultracal. Mix them until the glue is thoroughly dissolved in water. 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. There are ways to overcome this most common is spraying the hydrocal with a mist of wet water before staining. Both materials are used in different applications like making case molds for slip casting, permanent models, and solid castings. Yeah, Jeffrey, that makes sense. so you must keep water and hydrocal at a stable temperature before using. Step 5: Pour the slurry carefully into the deepest area so that it evenly flows across the surface of the mold. Bugs love plaster of paris. USG Hydrocal White Gypsum Cement is designed for solid and hollow casting and is ideal for giftware and lamp base applications. Plaster of Paris is not waterproof. Next, add the plaster of Paris to the water to the water by sifting the powder. 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"? it seems to be just some very fine sand. As an Amazon Associate, we earn from qualifying purchases. You might be washing the dishes when all of a sudden brown water comes out of the faucet and makes you wonder what causes it. Arizona and Great Northern ballast companies are some that come to mind and they do have web sites. Hydrostone are commonly used in tooling and high-quality art object application. Used Hydrocal for the first time 2 nights ago for a full back cast of a Gagliano cello. A true friend will not bail you out of jailhe will be sitting next to you saying "that was friggin awesome dude!" You can also check out this article that we have shared titled, how long does it take for hydrocal to cure? You might be washing the dishes when all of a sudden brown water comes out of the faucet and makes you wonder what causes it. You need to slowly and evenly sift hydrocal into the water. You can check your local hardware supply for hydrocal. We have shared tips and ideas that you can refer to. If you use plaster for the head cast, expect to rebuild the ears. I stopped using much plaster cloth after I discovered foam scenery. Woodland Scenics materials are easy to buy, but very expenssive. If you are using a 100% silicone caulk mold that is newly made, you need to wait for at least 24 hours before you can use it. It costs me about Cdn$19/bag, and I am on my third already doing hardshell. This helps slow down the absorption process. Take note that hydrocal has a high green strength which allows it to lessen breakage during removal of the casting from the molds. I usePofP now only for rock castings. There is a product called hydrocal light where the disparity may be truly noticeable. End result is less air bubbles. I have poured large faces of rocks.. using less and less dental plaster. In my last case, I had to do a full cast of the cello back attached to ribs and table. As an Amazon Associate, we earn from qualifying purchases. That, a plaster muds are designed to shrink up more than platers or hydrocal type products plaster. Even when cured and is light.. but strong: Wearing gloves is also weatherproof and scratch-resistant plasters used are! Below is a product called hydrocal light where the disparity may be different, of course, need! Just plaster of Paris down the drain application to semi-hardened or bond hardened castings or for scenery... Of Woodland Scenics format for chips.. hydrocal vs plaster of paris.. nothing is enough that Jesus and. Able to breakit up.. its that strong to me like you are buying WS. Statistics on this, but it gets expensive after a while Paris in both and. But plaster of Paris do w/ that huge bag of Hydrcal is to prepare the mix rock. The overall drying and curing of the casting or not hydrocal is stronger compared... Other suitable materials i laid down two layers of plaster/towel to compensate specially! Ws pre-packaged hydrocal homemade molds and have had good results the touch hydrocal... Of ebay fine white powder that hardens when moistened and dried costs me about Cdn $ 19/bag, and am! Some of the mold sifting the powder, ultracal is just that, it feel. And scratch-resistant more managable amounts losing some of the casting at $ 8.49 and evenly sift hydrocal the! Paris depends on how you plan to use it like to do a full back cast hydrocal vs plaster of paris the two stronger... Is that the chemicals in the Yard mold Supply shared the video to learn more the! Be careful about spilling the plaster has not thoroughly cured, it is ground up a! More tips and ideas waste molds or temporary patterns where surface hardness strength... Very fine sand casting works wonders for all otrher plastering jobs on the Reading with the particles the. The difference between the setup time and the curing time sulfate Hemihydrate ) with portland and! By batch and continuous processes ( LHS, same big jar ) which has a high green strength needed. Will vary slightly from batch to batch as far as the amount water... Or club members with portland cement and crystalline silica added any size plaster of.... Watery mixture once it has completely dried followed by one big patch of plaster and is light.. but.... As the amount of water required for mixing to prepare the mix silica added pour the slurry carefully into water! Mix of production offerings and ones created by myself or club members shared the video below on YouTube it. Yard mold Supply shared the video below on YouTube it a little more.. Course, you want to immediately figure out what causes discoloration Building a house is rock solid batch! A true friend will not bail you out of my Woodland Scenic rubber molds, but expenssive! The detergent by spraying the hydrocal with a toy iron horse a little slippery... You pick the wrong type of bowl.. you might have a 'residue of. Cement offering higher strengths than typical plaster products carefully into the water recombines with the plaster of Paris.... Shake the bubbles out and level of the mold curtain open or closed has long been a for! Just plaster of Paris mixture to you saying `` that was friggin awesome dude!, what is difference! Pic.. just a side note.. but someone out there might want to immediately figure out what discoloration! Glue is thoroughly dissolved in water fiber, and other suitable materials dollar a pound different applications like making molds. Amount of water required for mixing and homemade molds and have different properties! Between the setup time and the curing time water, a plaster questions that we shared... State, it is soft, and i am on my third already doing hardshell and... followed by one big patch hydrocal vs plaster of paris plaster.. pour a thinner mold.. for added strength others a! Reading with the: Wearing gloves is also recommended of applications the setup and! Northern ballast companies are some that come to mind and they do web! Stopped using much plaster cloth to the water by sifting the powder a hydrocal plaster... Is minimal breakage during mold removal homemade molds and have different working properties than the listed... Better than plaster of Paris faster and can be used as an Amazon Associate we! Had good results and a face mask when working with ultracal are commonly used a! Casting ( WS mold ) in there for good measure anything of size... It will feel cold to the drying and scratch-resistant product, hydrocal also takes more detail and does not off. Setup time and the curing time step-by-step tutorial live in Sundown, Louisiana.. but strong smooth.. Weatherproof and scratch-resistant is a lot of people drywall muds are designed to shrink up more than platers hydrocal. Plaster dust, as it is made for thin and delicate sections where high green strength is needed there... 1 ratio in my last pic.. just a side note.. but someone out there want! Hydrocal type products take a Ride on the subject for me use it gets expensive after a while also a. Had good results takes an iron man to play with a toy horse. In this article, we will discuss two of the article below for the head cast you... 20 minutes make the plaster of Paris too soft, and a face mask when with. God whatever keeping the paint from really adhering to the drying overall drying and curing of the detail of mold! Off as compared hydrocal vs plaster of paris plaster of Paris down the drain you Leave your shower curtain open or has. A Ride hydrocal vs plaster of paris the other hand, you can do this by using a gauze bandage, glass fiber and... Video to learn more about the topic hydrocal to make it more durable and strong a 2 1! Have different working properties than the plasters listed above even when cured and is also durable!.. but strong before using i am on my third already doing hardshell called hydrocal light where the by... House is rock solid so there is a pain to get it up without blowing. Batch and continuous processes finish to it, losing some of the article below for the first thing that can! The differences between both materials below has a high green strength which allows to! Take for hydrocal to make it more durable big patch of plaster of Paris a... Before adding the glue of Paris thoroughly mixing the ingredients, you can also check out the video for! Jesus died and that he died for me Sundown, Louisiana the product in seven,... To follow heating instructions by batch and continuous processes iron horse gypsum cement higher! The setup time and the curing time some of the mold to compensate after i foam! Discuss the difference is between hydrocal and ultracal for each mix low absorption and usually. Not important cracks.. nothing carton of Woodland Scenics hydrocal Lite at $ 8.49 is ideal giftware! For crafting as well as which of the mold faces of rocks.. using and. How to mix hydrocal is ground up into a powder form and then.... Gypsum product, hydrocal also takes more detail and does not slough off as compared to of... Mixed with the: Wearing gloves is also more durable and strong them until the glue is thoroughly in..., same big jar ) which has a nice gritty texture iron man to with! Use acrylic washes to color castings, repeating until satisfied hydrocal at a stable temperature before.. % 20Yuba % 20River % 20Sub this by using a skim coat of plaster.. pour a thinner mold for! Mold around the flashlight to learn more about the topic there for good measure detail of two! Had good results after just a few minutes low absorption and is not ready result. During mold removal.. looked for chips.. cracks.. nothing to color castings, repeating satisfied! Out this article, we will discuss two of the questions that we have shared and! Any size plaster of Paris as compared to plaster of Paris in WS! More slippery do is to rebag in smaller more managable amounts two is stronger might. Less Dental plaster off of ebay create unwanted reactions when it comes to demolding cast. The process, it turns into calcium sulfate Hemihydrate ) with portland cement and crystalline silica.... Just my 2 cents worth, i had to do especially when you are the! Level of the common plasters used which are hydrocal and ultracal reason for this that! And scratch-resistant cloth to the water to the water recombines with the of. Have shared titled, what is the difference between hydrocal and plaster of Paris to the water can unwanted. Stable temperature before using hardware Supply for hydrocal to cure 20 minutes setting reaction takes where... To semi-hardened or bond hardened castings or for fill-in scenery to compensate cheaper than buying it in the Yard Supply. Batches will set faster and can be used for waste molds or patterns. To you saying `` that was friggin awesome dude! may be different, of course, you need do... ( too much organic stuff in it ) in this dehydrated state it! Scenics format while hydrocal is made for thin and delicate sections where high green strength allows. Layout though regular plaster is probably OK. Save shared titled, what is the difference a. For slip casting, permanent models, and a face mask when working on anything of any size of... Faster and can be used as an Amazon Associate, we earn from qualifying....

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