How much color pigment or tint do you add to your surfboard resin? Here's a guide to help you start mixing your surfboard pigments and tints to both polyester and epoxy resins.
There is no specific measurement of resin tint or pigment. It depends on the depth of color you want. A good place to start is to mix in about 2% color to resin ratio (by weight) and work from there. The maximum amount of tint or pigment is 5%. Adding too much color will get the the way of the resin curing and make it softer.
It is a good idea to test your color before putting it on the board as the color will look much darker in the mixing bucket than on the surfboard. Start by mixing your colors into the resin and spreading it on some scrap foam or white paper to see how the color will look. Keep adding a little at a time. When you are satisfied then add the catalyst (polyester resin) or hardener (epoxy resin) and laminate your board.