Sourced from the sap of acacia trees, gum arabic is an essential component of watercolors. It is a water-soluble natural binder that helps to suspend and hold pigment particles together. Available in both powder and liquid form, gum arabic can be easily mixed by do-it-yourselfers who want to produce their own stable watercolors. You can also mix additional gum into your paints to improve viscosity and allow more precise brushwork. While it might not be a fundamental tool to keep in your studio, gum arabic can be a great problem solver when it comes to finicky jobs.
Source: artnews.com
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