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Wet lay-up using hand or spray techniques is one of the simplest methods of combining a fiber reinforcement with a solidifying resin to form a composite structure. This article describes several wet lay-up processes - including contact molding, spray molding, vacuum bag molding, and autoclave molding - suited for making parts on open-faced molds using polyester and vinyl ester resins. The article also provides information on mechanically assisted lay-up which can be automated to alleviate some of the manual work.

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Hand Lay-Up, Spray-Up, and Mechanical Lay-Up, Engineered Materials Handbook Desk Edition, Edited By Michelle M. Gauthier, ASM International, 1995, p 539–545,

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