Gum Arabic Solution

Used in the binder for Watercolour paints, it’s also available to buy as a separate solution and can be used to improve the transparency and gloss of the watercolour, it can also be used to slow the drying time and can also be used for controlling spread when painting wet-on-wet

Professional Artist Michele Webber’s YouTube video: 8 Clever Gum Arabic Tricks (For Watercolor!) explains some very useful tips and trick for this medium

It can be bought and used to make your own watercolour paints (with a few axillary materials) but be aware that all manufactures will have a slightly difference formula for their gum arabic solution so sticking to one brand is definitely advised