white discoloration on fiberglass, pls heeelp lol
We’re laminating a longboard deck using epoxy resin, a poplar core, and fiberglass on the top and bottom. During layup, the fiberglass appears fully saturated and transparent. We then place the deck in a 100cm x 25cm mold, apply approximately 50 tons of pressure in a hydraulic press, and use a heated blanket set to 70° for about 40 minutes to cure. Initially, the deck looks transparent as expected, but within an hour after removal white discoloration begins to appear over most of the surface (see attached picture). Has anyone encountered this issue? What might be causing the white spots, and what steps can be taken to prevent or remedy it?
Posted Mar 29, 2025, 10:36 AM UTC
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