Aquazol vs Gum Arabic binder in watercolour

Here are some unscientific tests between the Aquazol binder that's used in QoR watercolour and gum arabic used by many other brands. Aquazol (Poly(2-ethyl-w-oxazoline) was first patented in 1977 by Dow® Chemical. It's a watersoluble polymer designed as a substitute to gum arabic. Aquazol is said to be able to hold more pigment than gum arabic. Based on the swatches above, the

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