The Best Alginate Formulas for Casting Gypsum Plasters. Alginate impression materials are widely used not only in dentistry where they were developed, but for the making of skin safe molds for artistic castings.
Artists and mold making expect that the use of alginate materials will provide high detail down to the fingerprint. However the quality of gypsum cast surfaces when poured against alginate impression materials can vary widely. This article is a summary of three studies of the effects of various alginate mold making materials on the cast surfaces of gypsum plasters.
One study evaluated 16 different gypsums poured against 32 different alginate surfaces, including a Plexiglas control surface. Five hundred and twelve gypsum surfaces were produced and evaluated for quality by visually assessing the surfaces for smoothness with the aid of photomicrographs. Another study found that some alginate mold making materials produced gypsum casts that had rough, chalky, soft surfaces. Like this: Like Loading... Choice of Plaster Bandages at EnvironMolds. Plaster bandages are a popular tool in the field of mold making and life casting.
They are regularly used for making shell molds, pregnancy molds, belly molds, reinforcing rubber molds and also for making face masks. All you have to do is roll out the plaster bandage and cut 6 to 8 inch long strips. Dip one piece into a bowl until it is saturated with water before lifting out and gently squeezing the excess water. Apply successive coats on the alginate/rubber mold or directly on the stomach/face in such a way that each subsequent layer overlaps the previous one by a third. The plaster in the bandage will dry to form a firm and rigid shell that captures the rough shape and provides adequate support to soft molds. If you are looking for plaster bandages, EnvironMolds stocks them in 3 types: These are top quality, skin safe and smooth Plaster of Paris bandages that are formulated to wet out creamy and set within a couple of minutes. Like this: Like Loading... Make a Mold With EnvironMolds, LLC. Molds can be made of a variety of materials such as alginate, moulage, clay, wax, plaster, polyurethanes, silicone rubber and latex rubber, to name a few.
The process can range from simple and quick for one-part molds to lengthy and complicated as in the case of multi-part or brushed molds. One thing that most mold making materials and processes have in common is the use of a mold box. Else, the material will just flow away and fail to retain the requisite shape. You can easily use an existing box, pan, can or other container when making molds of small objects.
Get Your Mix Ratios Right. Get Your Mix Ratios Right This is because the quantities in which you mix the mold making or casting ingredients will directly influence everything from the consistency of the mixture to the ease of application to the quality of the end product — to wherher or not your ingredients will actually cure.
Even slight variances in the mix ratios can result in chalky, cracked or squashy molds and casts that will ultimately fail to serve your end purpose. You also have to keep in mind that when it comes to mix ratios, every product has its own ratio. For instance, the ratio will vary for alginates, gypsums, polyurethane resins, silicone rubbers and so on. Moreover, different brands of alginate may require different mixing ratios depending on their individual characteristics. You also have to consider what the product has to be mixed with and purchase the products accordingly. Again, pay close attention as the mixing ratio can vary as per volume or as per weight. Mold making and Casting products through EnvironMolds, LLC: EnvironMolds Website Ggets Even Better! I always find the website of EnvironMolds, LLC (artmolds.com) very easy to use.
I can easily find the products I am looking for and can also gain useful information like how to make two part molds or even how to cast a face. So as usual I was accessing the company website in my browser and was simply amazed to find that EnvironMolds has completely revamped its website. The look and feel has become quite trendy and attractive as opposed to the slightly dated appearance earlier. And unbelievably, the user-friendliness has gone up by several notches too! What I liked best is the ‘Shop by your Interest’ section.
Keep Yourself Safe in the Art Studio. The world of mold making, casting and life casting is very wide-ranging with a variety of materials and equipment that can be used to create beautiful and varied casts and life casts.
In fact, you are only limited by your imagination as there are so many products that can be used in different ways to craft different hues, effects and what not. You can start with simple clay, wax or plaster and even move to other materials like resins, rubbers and latex for making diverse items. Mold making and Casting products through EnvironMolds, LLC: A Product for Every Application. EnvironMolds boldly claims to have a product for any and every type of mold making, casting and life casting application.
I found this assertion very unbelievable because as a practicing artist I am aware of the sheer multiplicity of items needed for making even a single life cast, or even just a regular cast for that matter. Therefore, I suspiciously perused the EnvironMolds website and I have to admit that I was feeling a bit staggered by the array of mold making and casting materials, supplies and equipment available for purchase. Those who are looking for mold making supplies can opt for anything from alginates, moulage, wax or clay to polyurethane rubber, silicone rubber, thermoset rubber or liquid latex as they choose.
The casting supplies section is equally varied with plaster, gypsum, latex, resin, plastisol and silicone on offer.
Mastering Mold Making - Complex Molds Vol. 2. - Advanced Silicone Molds - Advanced Resin Casting - Two-part molds - Injection casting - Demolding - Finishing This is the second video in the Mastering Mold Making series by international mold maker Michael Kryger.
The video then demonstrates the creation of a thin walled two part injection molds. Michael continues his in studio mold making instruction by demonstrating proper methods creating parting lines, mixing, pouring and de-airing silicone and casting and injecting two-part polyurethane resin. Michael began as an apprentice mold maker with Boeing Aerospace in Canada where he trained in precision mold making for high tolerance parts. Master the Art of Finishing your Life Casts. You have perfectly mastered the art of making intricate molds of a live human body.
You are even aware of the importance of a vacuum chamber and always make it a point to use a vacuum pump with vacuum chamber to completely eliminate the possibility of having air bubbles in your cast. Then you are able to make detailed life casts from the molds that you have carefully crafted. But no matter how comprehensive or elaborate your life cast may be, it will always need some level of finishing to make it presentable. Indeed, the most realistic and detailed life cast is not ready as soon as it is cured and taken apart from the mold. Brushing off the excess material and then sanding, smoothening or polishing is almost always necessary.
The most popular finishing is to obviously paint the surface of your life cast. Apart from painting, other finishes can also be achieved on life casts. Alternatively, you can achieve a faux metallic finish even after the life cast is complete.