What are the differences between water colour and gouache whites?
The difference between the gouache and watercolour whites is the amount of binder in the two ranges. Watercolour traditionally has more binder/less pigment and is therefore more transparent than the gouache which it used for block colour. A benefit is that they are intermixable; you can use gouache with watercolour and vice versa. You could also mix the two together consequently achieving varying degrees of opacity.
