I don’t know why it has taken me so long to realise this but tonight it finally hit me. If you want to build up dark tones you have to let the previous wash dry completely otherwise the wash gets lighter not darker. I must be more patient! This was supposed to be a dark moody portrait.
Roberts31 
Hi David.Yes that’s because of the water diluting the paint. Simple science! 😂😂 I learnt all that in one of the courses I went to in Wimborne. Anyway no one can say you’re not persistent! Gill x
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