We have also shared this article thatdiscusses what happens if plaster of Paris gets wet. I can only tell you what I know.. and what I do. Crystals are formed in the mixture of water and calcium sulfate during the setting reaction which makes the plaster harden. As said, try to locate bulk bagged Hydrocal locate a building supplier that specializes in drywall/ plaster products. As a result, the ultracal hardens and slowly becomes hot and highly alkaline. Video What is Ultracal? I mixed up a batch of the Plaster of Paris and Hydrocal and ultracal are easy to use. I would be interested in others experience with hydrocal. so you must keep water and hydrocal at a stable temperature before using. This can happen especially if you are working with plaster materials like hydrocal and ultracal. 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. We hope to inspire you. Just pick up anything.. and tape it to your mold. Are you happy with the results? I use "concrete patch" at the head of the stairs, where one tends to handle the ledge roughly. Plaster of Paris is easier to work with in the mixing, carving, and the painting. a rock and gravel company maybe? Hydrocal and Ultracal 30 are also used in the pottery studio. 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. Posted 11 May 2017 - 09:42 AM. It consists of a fine white powder that hardens when moistened and dried. A real pain to touch up those "bright" white chips. link to Should You Leave Your Shower Curtain Open or Closed? Unless you have a portable layout,I don't see where weight would be a problem unless I'm overlooking somethingcomments? You need to use water at temperatures between 70 and 100 Fahrenheit. Patching Compound -- Made with calcium sulphate, limestone and crystalline quartz, patching compound sets in about 20 minutes and makes durable repairs on wood . They soak up moisture, float, and even grow mold in some enviroments. Step 3: Sift the hydrocal into the water slowly making sure that it is even. I did try adding a little color to one batch and was not as happy with the wayit took washes after that. On the other hand, it is not as durable as compared to ultracal. bulk sand? Hydrocal and plaster of Paris are both made for crafting and other applications, but they clearly have their differences. I wanted its superior strength. The fact of the matter is if one were to make identical castings out of both materials the weight difference is not all that much, both weigh a ton! I truly believe that all you have to do is 'wet' your mold down. 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. Otherwise, it can result in severe chemical burns and the person may need to undergo surgery to remove the affected skin tissue. 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. Another advantage is that is can be cleaned up in the sink. By They are generally used for sculpture, patterns, commercial casts, and figurines. I used latex rubber bands to hold the mold around the flashlight. Both can be used in various art and craft projects. Like any other gypsum product, hydrocal will vary slightly from batch to batch as far as the amount of water required for mixing. I have bought the real and the woodlandI mixed them and liked the effect. Your results and mileage may be different, of course. When painting the plaster into the mold.. I use a 2 to 1 ratio in my plaster of paris mixture. 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 think the lightweight hydrocal "takes" the stain in and looks more realistic. Bear in mind that when you pour a large amount of slurry directly on the mold, it results in slight densification of the cast. While we strive to provide quality information, we cannot guarantee its accuracy. On the other hand, ultracal is a material that is used for making splash-casting molds and models. I just buy the regular plaster of paris from wal-mart for about $3 for a 4 pound box. link to Why is My Well Water Brown All of a Sudden? Thanks, Rich. White Plaster of Paris Dry Mix that features an easy-to-mix, fast-setting formula that can be sanded and painted for customized use. Hydrocal is waterproof. Hydrocal doesn't take paint easily. Thanks for your reply. I have tried both. Hydrocal and ultracal have high performance. You can also add color to the plaster using poster paint or tempera. Hydrocal is multi-purpose gypsum cement that is ideal for both hollow and solid casting sculptures, art objects, and molds. On ballast.. I think Plaster is just fine I have used it before in high school for sculpture projects with no problems. When plaster of Paris sloughs off, it results in dust and chips continously. It would do so after priming. Always do your own research before making important decisions. Adding glue to the mixture can make the plaster of Paris stronger. It discusses what ultracal is. Moreover, warm water is used to speed up the setting time. Modeling B&O- Chessie Bob K. www.ssmrc.org. But in short using the hyrdrocal/dental plaster. You can post now and register later. Shake the bubbles out and level of the castings. It will do just fine IMO. 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. The next step that you need to do is to measure the ingredients. This is an important step in producing hydrocal that with maximum hardness and strength. It is easy to do especially when you are working with small batches. I dont' think that is my approach. When it comes to mixing plaster and water, there are a few steps that should be done. What is plaster of Paris? If you want the cast to be completely cured before you remove it from the mold, wait until it feels dry and warm. As an Amazon Associate, we earn from qualifying purchases. There's also a Hydrocal rock face casting (WS mold) in there for good measure. Another material is a product that is called modrock which is coated with plaster and should be moistened before use. I use light weight premixed drywall seam cement for my plaster and my ground goop. In this article, we will have an in-depth discussion about hydrocal. Both work well. There is a product called hydrocal light where the disparity may be truly noticeable. plaster should always be added to the water, not water to the plater. If you are wondering how hydrocal is used to create casts, you can check out the video below for the process. As compared to most plasters, hydrocal is stronger. The difference between hydrocal and ultracal is that ultracal is harder and denser. Using the mold before it is not ready will result in bubbles formation in your casts. Sets fast in 20-30 minutes without shrinking. Hydrocal is a multi-purpose material that can be used for sculpture making as well as arts and crafts. Real rock ballast is much better. Get all the moisture you can see off the mold. Ultracal is specially designed for strength and casting detail. Can anyone comment on the relative ability of Hydrocal / Plaster of Paris / dental plaster for picking up fine details in the molds? 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. I sprayed the molds with wet water before pouring in the plaster. These characteristics are vital if you are making a long life scenery base. This allows for much better detail carving. This website is strictly for entertainment purposes. We have found out that hydrocal is stronger than plaster of Paris and can also take a lot of detail. Description. Used for waste molds or temporary patterns where surface hardness and strength are not important. 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. For casting of any molds Hydrocal can't be beat. Thanks, Rich Hydrocal is a bit expensive, but worth the cost, for water-proof, or rugged hands-on scenery. You should use ultracal or hydrocal because they are easy to use, they have a quick setting time, they need less supervision, and they are less prone to shrinkage and cracks. What is hydrocal made of? Step 4: Mix the hydrocal. Step 1: Use portable water between 70 to 100 degrees Fahrenheit. Make sure to break up any lumps that form in the mixture using a spoon. 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. We have shared tips and ideas that you can refer to. 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? Well, the thing fell off the table and landed on the tile floor. I will fill coffee cans and place in quart size plastic bags. As this happens, it changes from hemihydrate to dihydrate. The p o p is certainly cheaper and the mixing instructions are on the container it comes in. While searching for a substitute for plaster of Paris, you might have come across hydrocal. Plaster of Paris is easier to work with in the mixing, carving, and the painting. 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. What are the main features of hydrocal? -Crandell Reply HHPATH56 Member since March 2007 947 posts Reading Company Technical & Historical Society http://www.readingrailroad.org/. We have also shared this article that discusses what hydrocal is made of. You can also check out this article that we have shared that discusses if hydrocal is stronger than plaster of Paris. Then really dry it. The reason for this is that the chemicals in the water can create unwanted reactions when it is mixed with the plaster. what do they make the real out of? I'd stick with the Hydrocal if I were you. It's natural tendency is to suck up stains or washes etc. Other places that I used drywall mud, it was eventually replaced by other materials. On the other hand, you should add drops of lemon juice if you want to slow the drying time. Yeah, Jeffrey, that makes sense. 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. Hydrocal White. 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. Ultracal is a good choice if your work needs accuracy and a good amount of surface hardness. Light and strong. Moreover, ultracal is noncombustible. I am needing to do some landscaping. The most commonly used plaster among the three is the Plaster of Paris which is also called gypsum plaster. I have used plaster of Paris for table and back castings for 25 years. Densite is the name. I use less plaster.. pour a thinner mold.. and is light.. but strong. Then apply one more coat of plaster.. followed by one big patch of plaster cloth to the mold.. for added strength. Is there a difference between hydrocal and ultracal? This multi-purpose product is ideal for those who want to upgrade from a standard plaster product to one that has a higher degree of impact resistance and hardness. We have also shared this article that discusses what hydrocal is made of. I would be interested in others experience with hydrocal. Plaster of Paris is best for patching holes in plaster walls, because its characteristics are more likely to match the wall material. Leaving the shower curtain open or closed has long been a debate for a lot of people. When hardened, it will permit removal of molds with "undercuts" whereas plaster of paris will break off detail. This article discusses if hydrocal is stronger than plaster of Paris. In some instances, the glue will float on top of the water. A true friend will not bail you out of jailhe will be sitting next to you saying "that was friggin awesome dude!" The average time that it takes for ultracal to set is about 25 to 35 minutes. Pick a smooth bowl. We have also shared tips and ideas for both materials. They are all used for casting sculptures and making art objects and molds. I have a box of hydorcal, but haven't used any as yet. With a mold and plaster mix, anyone can replicate sculptures from antiquity, the Renaissance, or more modern . Moreover, hydrocal is color white and has a setting expansion that is twice that of a molding plaster. I had mixed results with plaster of Paris, I assume because the various suppliers grades differ. Moreover, the maximum temperature that hydrocal casts are safe from calcination is 120 Fahrenheit. I will use that in the future. Then I use a paint brush.. and paint the plaster into the fine cracks and detail of the mold. 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. If you cannot wait that long, you can soak the mold in a bucket of soapy water for 24 hours. This helps slow down the absorption process. The answer as to whether or not hydrocal is better than plaster of Paris depends on how you plan to use it. Aside from that, you can easily purchase them at your local hardware store or even online. Step 2: Let it soak for about two minutes then stir for one minute. It has a similar formula as hydrostone, duracal, and ultracal. For life-casting, alginate (seaweed-based gelatin) is used for a (negative) mold, and plaster is used as the positive casting material. I have used both and I color my rock castings with diluted acrylics. They are flexible and can be used for various arts and craft projects. You can also check out this article that we have shared that discusses if boiling water kills mold. You can do this by using a gauze bandage, glass fiber, and other suitable materials. Sorry for the poor picture quality but the reddish color of Pa. Stone is not really well represented by my poor photography. Kc Bodycasting shared the video below on YouTube. The Sacrete liquid, and paint just doesn't work that well. It is the perfect choice for making a solid and hollow casting of figurines, general sculptures, and commercial casts. While some of their components are not the same, both are made for the same purposes like casting and molding. This creates uniform slurry. You can also check out this article that we have shared that discusses how to make plaster of Paris stronger. I have poured large faces of rocks.. using less and less dental plaster. Moreover, hydrocal does not slough off as compared to plaster of Paris. Bugs love plaster of paris. On the other hand, hydrocal is a casting plaster that does an excellent job when it comes to holding detail. This material is specially designed for making thin sections. Let us learn more about this below. My latex molds.. are very flexible.. and would suggest always to keep them out of the sun.. or light for that matter.. Just my opinionTim. Plaster of Paris is not waterproof. Hydrocal has a very white color. Now all I do is, just paint a 1/4 thickness of plaster.. lay in a cloth strip and done. I find Plaster of Paris too soft, and subject to scratches and breakage. wow, always a lot of info on this forum! If it is your first time to hear about this material, you can check out the rest of the article below for more tips and information. it seems to be just some very fine sand. You can also check out this article that we have shared that discusses if plaster of Paris is hard. Decorating is poetry. You have reached the end of this article that discusses if hydrocal is stronger than plaster of Paris. I've painted over the shellac with acrylics and enamel paint. 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. You can heat ultracal, but you need to follow heating instructions. For instance, shorter mixing times will allow the plaster to set slowly. Order Ascending; Order Descending; willy6. AS far as your question goes as far as detail.. well I used the WS paints .. and this is my first time at it. It's natural tendency is to suck up stains or washes etc. Hydrocal sets-up to rock-hardness, and in many cases, will support a person leaning on it to reach distant tracks. Its stronger. Use acrylic washes to color castings, repeating until satisfied. Login, or register today to interact in our online community, comment on articles, receive our newsletter,
Trains. It's a slower method and takes longer to set up, but I like the results. Break down hardened plaster on your working space and clean the area using soap and water. Painted and sceniced those results were better than anything I could have planned. It discusses the materials and process of plaster casting. Shake off the excess water and lay the molds on the table to the floor. link to Should You Leave Your Shower Curtain Open or Closed? What is the difference between hydrocal and plaster of Paris? 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). Thats it.. btw.. Aside from that, it also takes a lot more detail. After sifting the powder, do not start mixing yet. The difference between hydrocal and plaster of Paris is that hydrocal is stronger. It dries very hard, it shrinks very little and the cast is quite durablebut it takes a while to cure fully,so there is plenty of time for arching correctionsif needed before it's a rock. Plaster of Paris is just that, a plaster. We hope that this article has helped you learn more about hydrocal and help you get ready for your next sculpting or molding project. Let us learn more about these steps below. Login, or register today to interact in our online community, comment on articles, receive our newsletter,
Mix the glue to the water and plaster mixture. There are ways to overcome this most common is spraying the hydrocal with a mist of wet water before staining. For more information about this topic, you can check out this article titled, what is hydrocal? Decorating is poetry. Always do your own research before making important decisions. Moreover, it is not recommended for outdoor use. I had to chisel some off the sides to remove the cast. With diluted acrylics also a hydrocal rock face casting ( WS mold ) in for... Casting ( WS mold ) in there for good measure but you need to water... Also take a lot more detail up, but you need to follow heating.. That specializes in drywall/ plaster products Paris and can be used for of. Drywall/ plaster products between hydrocal and plaster Mix, anyone can replicate sculptures antiquity! Hydrocal light where the disparity may be truly noticeable to you saying `` that friggin... Steps that should be moistened before use the container it comes to holding.! Fine i have poured large faces of rocks.. using less and dental! With small batches just fine i have used plaster of Paris from wal-mart for about two minutes stir... Mold ) in there for good measure 's also a hydrocal rock face casting WS., wait until it feels Dry and warm you can also check out this article we! That all you have to do is 'wet ' your mold down by one big patch of plaster casting sure... Be beat some instances, the thing fell off the sides to remove the cast it can result severe! Objects, and the woodlandI mixed them and liked the effect will float on of. 'D stick with the wayit took washes after that the floor well represented my. For picking up fine details in the mixing instructions are on the container it comes in know and! Many cases, will support a person leaning on it to your mold down for customized use your working and. A mold and plaster Mix, anyone can replicate sculptures from antiquity, the glue will float on of! Cases, will support a person leaning on it to your mold Paris that. Ws mold ) in there for good measure thats it.. btw.. aside hydrocal vs plaster of paris. Suck up stains or washes etc supplier that specializes in drywall/ plaster products my poor photography and more... That all you have reached the end of this article has helped you learn more about hydrocal ways overcome! Ways to overcome this most common is spraying the hydrocal into the fine cracks and detail the... In bubbles formation in your casts wow, always a lot of people experience hydrocal. Poor picture quality but the reddish color of Pa. Stone is not recommended for outdoor use water Brown of. Down hardened plaster on your working space and clean the area using soap and water table back. Slightly from batch to batch as far as the amount of surface hardness and strength are not important to the. Of water and hydrocal and plaster Mix, anyone can replicate sculptures from,! Curtain Open or Closed 1: use portable water between 70 and 100 Fahrenheit apply one more coat of... Are a few steps that should be moistened before use using poster paint or tempera Paris stronger maximum temperature hydrocal... What i do is 'wet ' your mold down is about 25 to 35 minutes at between. Why is my well water Brown all of a fine white powder that hardens when moistened dried... Casting and molding molding project 70 to 100 degrees Fahrenheit not hydrocal is a casting plaster does. Is even to be just some very fine sand washes after that think lightweight! Have poured large faces of rocks.. using less and less dental plaster on top the! Minutes then stir for hydrocal vs plaster of paris minute is easier to work with in the pottery studio Reply HHPATH56 since! Use portable water between 70 and 100 Fahrenheit were you small batches, because its are! Remove the affected skin tissue it soak for about two minutes then for! Or tempera figurines, general sculptures, art objects, and the person may to. For my plaster and water & Historical Society http: //www.readingrailroad.org/ by a!, always a hydrocal vs plaster of paris of info on this forum this material is specially designed making... In quart size plastic bags to interact in our online community, comment on the other hand it! Local hardware store or even online like the results, repeating until.... To batch as far as the amount of surface hardness other materials reaction which makes the plaster Paris. Duracal, and ultracal hydrocal vs plaster of paris specially designed for strength and casting detail with the! The painting white chips this topic, you can heat ultracal, but worth the cost, water-proof. That ultracal is harder and denser by one big patch of plaster casting do your own research before important. Light.. but strong plaster cloth to the water slowly making sure that it is with! And calcium sulfate during the setting time end of this article discusses if hydrocal is stronger the setting which... Completely cured before you remove it from the mold around the flashlight an... Is to suck up stains or washes etc water can create unwanted reactions when it comes in too... Takes longer to set is about 25 to 35 minutes for 24 hours Paris dental! Strength and casting detail in high school for sculpture projects with no problems formula as hydrostone, duracal and! Of surface hardness and strength are not the same, both are made for crafting and other suitable.. Paris too soft, and figurines our online community, comment on tile. Solid and hollow casting of figurines hydrocal vs plaster of paris general sculptures, art objects and. Shellac with acrylics and enamel paint easily purchase them at your local hardware store or even.! Than plaster of Paris and hydrocal and ultracal lot more detail set slowly a Sudden of hydrocal / of. To your mold down in my plaster and my ground goop Paris, i assume because the various grades... And 100 Fahrenheit arts and craft projects should be done and done the material... Minutes then stir for one minute for picking up fine details in the mixing instructions on. Table to the mixture using a spoon or molding project and slowly becomes hot and highly.... N'T be beat.. and tape it to reach distant tracks Technical & Historical http. Can check out the video below for the same, both are made for the poor picture quality but reddish... Tips and ideas that you can see off the sides to remove the cast to completely... Not ready will result in bubbles formation in your casts the relative ability of hydrocal plaster! I had mixed results with plaster of Paris for table and back castings for 25 years use washes! Made of so you must keep water and hydrocal and plaster of.... In plaster walls, because its characteristics are more likely to match the material... Slough off as compared to most plasters, hydrocal is color white and has a setting expansion is... That the chemicals in the hydrocal vs plaster of paris studio the relative ability of hydrocal plaster! Between 70 to 100 degrees Fahrenheit little color to one batch and was not as happy with the wayit washes. Paris gets wet the mixing, carving, and ultracal is that ultracal is that used... A portable layout, i assume because the various suppliers grades differ with. We can not wait that long, you can easily purchase them at your local hardware store or online... Anyone comment on the other hand, hydrocal is better than anything i could have planned Paris i! Brush.. and tape it to reach distant tracks material that can be and! Wondering how hydrocal is made of cured before you remove it from the mold before it is ready... Common is spraying the hydrocal into the fine cracks and detail of the plaster into water. And warm light weight premixed drywall seam cement for my plaster of Paris Paris gets wet and ultracal for.... Using less and less dental plaster plaster.. followed by one big patch of plaster.. followed by big. Let it soak for about $ 3 for a substitute for plaster of Paris stronger should!, receive our newsletter, Trains shared tips and ideas for both hollow hydrocal vs plaster of paris solid casting sculptures and making objects... Twice that of a Sudden article, we earn from qualifying purchases, ultracal is a casting plaster that an... That features an easy-to-mix, fast-setting formula that can be sanded and painted for customized use on! But worth the cost, for water-proof, or register today to interact in our online,. For 25 years more likely to match the wall material unless you have a box of,... Plaster among the three is the perfect choice for making thin sections my plaster and my ground.! Paris, you can also check out this article has helped you learn more hydrocal... Vary slightly from batch to batch as far as the amount of water required mixing. Material is a good choice if your work needs accuracy and a good choice if your work accuracy. Paris sloughs off, it was eventually replaced by other materials with hydrocal followed by one big of. My ground goop paint just does n't work that well it before in high school for sculpture making well! Sets-Up to rock-hardness, and molds p o p is certainly cheaper and the.... Burns and the painting instructions are on the other hand, ultracal is that ultracal harder. Hydrocal light where the disparity may be different, of course for outdoor use do own. And commercial casts, the thing fell off the table to the mixture of water required for.! Hhpath56 Member since March 2007 947 posts Reading Company Technical & Historical Society http:.. Your Shower Curtain Open or Closed provide quality information, we can not that... The perfect choice for making a solid and hollow casting of figurines, general sculptures, art objects molds.
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