Cobra Artists' Watermixable Oils - Prussian Blue - 40ml tube (S3) (508) (CWO508) Offering one of the widest ranges of watermixable oil colour, Cobra Artists' quality paints give the fabulous texture and qualities of traditional oils without mess and smell. With pure pigment colour they are one of the best quality watermixable oils available, and their comprehensive colour range offers you the opportunity to paint just about anything. Colour Index No.: PB27 Lightfastness:+++ Transparency: Transparent Series: S3 - Series 3 +++ = at least 100 years lightfast under museum conditions (all 70 colours) ++ = 25 - 100 years lightfast under museum conditions + = 10 - 25 years lightfast under museum conditions o = 0 - 10 years lightfast under museum condition Most orders will be with you inside of 12 days, although some may take up to 15 working days. If you have any questions, please use the address on our contact page