We know of quite a few people wanting to custom produce their own realistic, scary or fancy dress masks from latex to fizzle at the point where they need to produce the raw material required for such masks and to employ it. The knowledge needed therefor is largely unknown, but not completely unavailable. An excellent place to look at professional knowhow are patent applications. By filing for a patent, inventors are granted the exclusive right to produce and market products based on the invention exhibited in the patent application. In return, they have to disclose the invention so that the formerly tacit knowledge is published to the interested public, which is, under normal circumstances, free to use the invention presented in the patent after the patent itself has lapsed (either through nonpayment of the fees or after a certain amount of time).