What is the process of making fiberglass sculpture?

Fiberglass reinforced plastic, as the name suggests, is made of resin, glass fiber, talcum powder material. The production process is roughly, clay molding or cut foam, and then do the mold (negative mold), in turning fiberglass, with caustic soda water to wash the surface, hit the water grinding, primer, fill holes, sanding, coloring. Specific process: clay molding, this needless to say, the need is the ability to shape, the knowledge of space. Do mold, first of all, is divided into good clay molding position, this depends on experience, need to pay attention to is not a card position, in order to prevent the mold can not be disengaged. Find a good mold line, with PVC sheet inserted into the mold line, do the split mold so that the clay mold is divided into two parts or several parts. Mold materials generally use gypsum powder, high-quality white gypsum powder, water, the proportion I can not say, the first slightly thin, not too thin like water, and then use a multi-functional sprayer to suck the gypsum water spraying clay, the first time to every position are sprayed, especially under the position of the clay mold.

Then the second time to thicken a little bit, spray up, do not care whether the spray looks good, the more casual the better, the surface roughness can enhance the adhesion. Then use hemp wire dipped in thick gypsum paste along the edge of the mold to spread up, also every position to spread to, compaction. Not spread to the place, when the mold will crack off. Then hit the wooden frame fixed, in order to open the mold. After the plaster is dry, cut the excess plaster on the mold line until you see the inserts, and cut a few triangles to mark the mold, then open the mold, and the mold is ready. After the mold is done, it is sanded, if the surface needs to be rough, it can not be sanded. Then spray epoxy primer, then color to do the effect, and finally spray protection varnish, fiberglass sculpture is made.