WEST System epoxy is one of a few commonly used epoxies for boat building. It requires a 5:1 mix ratio, and although the available pumps do this by one (1) stroke each - often much smaller amounts are desired. The JPG file provides for mixing very small amounts, without having to resort to little cups and a set of scales. Just print out the file, cover with wax paper and dispense the resin and hardener to fill the small circles. If you want more or less mixed amount, use photo copier to enlarge or reduce.
http://www.rcsailing.net/uploads/F-48%20Multihulls/Mix_Epoxy$.jpg