Gum Arabic solution is the primary ingredient in watercolor paints and is the medium used to create your own watercolour from dry pigment. Mix 100g Gum Arabic to 300ml of water to make a watercolor binding medium.
Gum Arabic is a natural resin from acacia plants. Adding a 1:1 Gum Arabic/water solution to your water colour slows down the drying time and increases gloss. Gum Arabic washes will have greater depth and appear more luminous than colour washes alone but too much Gum Arabic will cause a brittle film prone to cracking.