Site dedicated to paintings of colored sand and natural pictures, postcards, stones and slates.
This technique learned in Senegal and the different polyphane I do not know.
Living near Fontainebleau (Seine et Marne), I have extremely fine white sand I dye it myself and I have over 100 different colors and also the natural sand of Britain or during my vacation in the abroad.
On a support (plywood, board management, slate, cork, postcards etc ...) should be drawing or tracing a pattern, then with a brush and simple wood glue, this glue only pass on a pattern (a petal flower for example), and put the sand (or sand to a gradient), then return the media to remove excess.
For the leaf veins, for example, I use a simple razor blade is very flexible.
No room for error when it stuck, it stuck!
Then it is a work of patience, but it's a real pleasure.