What is the difference between "Molding" and "Casting"?
Molding or Moldmaking is the act of creating the cavity / form that carries a negative or reverse impression of an original model. Molds can be made of a rigid material, such as plaster or plastic resin or more commonly, a flexible material such as rubber. The material to use should be chosen considering the material of the model, the material to be used to make castings, and whether there are any undercuts.
At AllBobbleheads.com... When we're making a custom bobblehead, the initial clay model that we present to you, and need your approval on in our Proofing Process, is used to create the mold for your bobblehead. Once approved, the clay model is suspended upside down in a cup where a flexible liquid rubber is poured around it, creating the mold.
Casting is the act of pouring liquid material into the cavity of a mold. After a period of time, this liquid will cure via chemical reaction or cooling. The solidified part is also known as a casting, which is ejected or broken out of the mold to complete the process. Casting materials are usually metals or various cold setting materials that cure after mixing two or more components together; examples are epoxy, concrete, plaster and clay.
At Allbobbleheads.com... Our bobbleheads are cast out of a poly-resin blend. Once cured, poly-resin is lightweight, waterproof, easy-to-clean, durable, and ages very well making it a fantastic material for a bobblehead!