Holbein Gum Arabic Watercolour Medium A la Prima Add white to these shades

Add white to these shades and all tones are also possible

Why mess up your hands

Red Shade or Phthalo Blue Green Shade instead

I use it for cropping images

This is particularly handy at plein air events when there is a show at the end of the weekend

Holbein Gum Arabic Watercolour Medium A la Prima Add white to these shadesGum arabic is the medium that binds watercolour together and gouache paints together. You can use This quality gum arabic in small quantities to give greater luminance and a slightly shinier appearance (careful don't use too much, or the drying ability of the paint will suffer). You could create your own paints using this with raw pigments too.