I have read about using a salt solution. Just what is it and what does it do?

This is something I have not personally used, but it can be effective. You mix 1 tablespoon of rock or sea salt to 100ml of hot water. Make sure that the salt completely dissolves. Paint the salt solution onto your silk (Habutai is best). Leave it to dry slowly in a cool room. When completely dry, crystals will form creating a texture of dots on the surface of the silk. Paint your dyes over the top of the crystals. This can create a great look as though it is snowing and therefore would suit a landscape.