Understanding the permanence of Gouache colours

permanence of gouache
Permanence in the main refers to lightfastness. Some of the most vivid pinks and violets are only moderately durable and are more suitable for designers’ artwork than fine artists who usually require greater permanence.

The permanence of a colour is described by Winsor & Newton using the system of AA, A, B and C. AA being Extremely Permanent and C being Fugitive where Fugitive means ‘transient’ and some fugitive colours may fade within months. For permanent paintings it is recommended that only AA and A colours are used as these are not expected to fade. Light Purple has a B rating and Parma Violet a C rating, fading over a 10 year period would not be unexpected with these colours.

 

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