1. The casting resin is commonly known as PU resin. The casting resin is actually Japanese HEI-CAST resin, which is short for non-foaming polyurethane resin. There are agent A and agent B, which need the same weight ratio to be mixed. Colors are white, beige, ivory and so on. (It will be different according to the arrangement number of casting resin, such as 80 12 beige, 80 14 white, 80 17 ivory white, transparent color, or other specially modulated colors). It is a material with light weight, excellent plasticity, best details and very good hand feeling. Therefore, Cast is the best material for GK model, but the price is more expensive than other materials, equivalent to more than 300 RMB (one kilogram for A and one kilogram for B, with a total weight of two kilograms). It is easier to handle casting resin by hand. At present, there are mainly cast resin original and Hong Kong version (please note that it is a real Hong Kong version, not the one that is turned upside down to pretend to be a Hong Kong version). Japanese handmade materials are generally labeled as cold resin casting kits, and cold refers to the forming process-cold forming, which means that the materials do not need to be heated and melted before entering the mold. Other plastics (such as pvc/abs/) must be heated and melted before injection molding. Resin is resin, and kit means kit. Cold-formed casting resin kit: 2.80 12, 80 14 and 80 17 resins are common models in AB water. 3. Polystyrene-Paulite powder resin mixed stone powder is a kind of cold resin. The price is cheap, less than 1/3 of the casting resin price. The English name is poly stone, which is the main material for the early completion of humanoid products. Basically, it is not suitable for manual enthusiasts, and it is the most unsuitable material for GK model. It has the advantages of impact resistance, heat resistance, high hardness, heavy weight, difficult cutting and poor plasticity. You can change the color by adding toner, which is heavy and brittle (for excellent reasons) and very easy to break. The abbreviation of PVC and polyvinyl chloride. That is PVC material. Europe and America often call it soft rubber material. The uncoated component made of soft rubber (referred to as soft rubber component for short) is different from the first one in that the material of this component is soft rubber, and the price is low, and the same shape can be bought with less money. In terms of modification, it has greater freedom than resin. Taobao has a sale. ..........