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The entire range of Isaro water colours has been developed to give maximum transparency to the colours. In addition, the ingredients that enter into the composition of the binder are all carefully selected.
Only a top quality gum arabic is used in the manufacture of Isaro water colours. Gum arabic varies in colour from very pale yellow to dark brown. The gum, in fact, darkens on contact with the tannin in acacia bark.
Consequently, it is essential for Isaro to select an acacia gum which, when dissolved in water, gives a clear solution so that the luminosity of the pigments is protected.
Glycerine and honey are added in very precise proportions to ensure the paste remains supple.
A single-flower honey was chosen, the honey of acacia, since good quality honey of this type is a very clear.