Gum Arabic
Previously known as Gum Acacia, from the Acacia tree found in Australia,
Africa and Asia. Best from Africa. When dissolved in hot water used as an
adhesive, stop out in litho printing, as a size, and more commonly as a binder
in watercolours and pastels. Plasticizers added as pure gum is brittle.
Adding gum Arabic to your watercolour has three effects-
- Slows down
drying time of paint giving you slightly longer to work on creating your
image or wet into wet
- Adds further
transparency to your water colour and it increases gloss.
- Watercolour
washes will have greater depth and appear more luminous than colour washes
alone.
Gum Arabic can be added to your jar of water if you prefer to use it
through out the painting.
Gum Arabic should not be used directly from the bottle because thick
films will be brittle.
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