Still, there is much that can be mixed and produced in one s own work space. Since published formulas and procedures for mixing watercolor binding liquids are scarce, most work must begin from general descriptions. For that reason, once you understand how certain ingredients modify pigment mixtures, you should record the types and amounts of ingredients used, steps taken, and final results so that future efforts are easier and results assured. The major binding agent for watercolor pigment is gum arabic. If lumps remain, let the mixture stand for a few minutes and then stir once more.
Salts are also likely to create a foggy cloud to the overall image.
This will help add a plastic quality to the mixture that contributes to smoothness for grinding pigment, painting consistency, and flow from the brush. Experiment to verify differences for yourself. This will help the mixture to retain moisture and prevent caking of pigment. It also improves brushability and increases solubility. Do not use too much glycerin, as an overabundance will produce excess solubility, making the fluid pick up too easily.