How can one be sure that the fluid is mixed properly?
A. The best way to be certain that a fluid is mixed properly is to check for consistent fluid density at various locations within the container. The simplest way to verify density is to use a weight-per-gallon cup or mini weight-per-gallon cup. Both are available (with instructions for use and reference to the test method) from Paul N. Gardner Co., Inc., 316 NE First Street, Pompano Beach, FL 33060; phone: 800-762-2478. For mixing that is mistake-proof, a paint shaker is ideal. Five minutes in a Red Devil paint shaker should be plenty. A rotary paint mixer (like the type that fits on a drill), or any other type of prop mixer, is adequate, but it is probably overkill unless it is taking hours/days to fill the device. Be certain not to turn the mixer up too high and whip in a lot of air, since doing so will hinder the mixing process.
