Water Table for Fine Gold Recovery
If you would like to see a video of a similar system. Please go to Youtube, type in: Gold Prospecting-with a Water Table ----  What does mesh size mean? Figuring out mesh sizes is easy. Just count the number of openings in one inch of screen. The number of openings is the mesh size. 5 mesh screen means there are five little squares across one linear inch of screen. A 200 mesh screen has 200 openings, and so on. As the number describing the mesh size increases, the particle size decreases. Higher numbers equals finer powder. Mesh size is not a precise measurement of particle size. Screens can be made with different thicknesses of wire. The thicker the wires, the smaller the particle size passing through that screen, and vice versa.What do the minus ( - ) and plus ( + ) plus signs mean when describing mesh sizes? -100 mesh gold would mean that all particles would pass through a 100 mesh screen. +100 mesh gold means that all the particles are retained on a 100 mesh screen.