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Estimating Quantities of Formulated Products Laminating Resins Resin/ Hardener Mix Required (g) = A x n x WF x R.C x 1.5* (1 - R.C.) Where: A = n= WF= R.C. = Area of Laminate (sq.m) Number of plies Fibre weight of each ply (g/sq.m) Resin content by weight Typical R.C.’s for hand layup manufacturing are: Glass - 0.46 Carbon - 0.55 Aramid - 0.61 Gelcoats and Coatings Solvent Free Resin/ Hardener Mix Required (kg) Solvent Based Resin/ Hardener Mix Required (kg) = A x t x ρm x 1.5* 1000 = A x t x ρm x 1.5* 10 x S.C. Where A = t= ρm= S.C. = Area to be coated (sq.m) Total finished thickness required (μm) Density of cured resin/hardener matrix (g/cm3) Solids content of mix (%) *Assuming 50% wastage, for resin residue left in mixing pots and on tools. This wastage figure is based on our experience of a wide variety of workshops, but should be adjusted to match local working practices. GTC-6-0417 - 69PDF Image | GUIDE TO COMPOSITES
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