May 30 2022 at 08:05am
The method is exactly the same as making a fiberglass template from a prototype. as the following details
weight of the gel coat to be applied to the surface = area of the template surface ( square meter ) x density x thickness of the gel coat layer (milimeter).
Usually, primary colors are applied in a ratio of 10 - 15 % of the gel coat weight.
weight of primary color mixed in gel coat = weight of gel coat x (10 to 15) / 100
the weight of glass fiber = area (sq.m.) x weight of glass-fiber (g./sqm.) x number of layers of glass-fiber.
( The meaning of glass fiber: No. 300 is glass fiber that weighs 300 grams per one square meter.)
Typically, the amount of polyester resins used in manual manufacturing methods is approximately 2.5 times the weight of glass fiber.
resin weight = weight of glass fiber x 2.5 times
catalyst weight = resin weight x 0.5 / 100 (0.5 % of the resin weight )
hardener weight = weight of resin used x (1 to 2) / 100 ( 1-2 % of resin weight )