Peter Valentine is a well known professional local artist and a long-time member of Derby Sketching Club. On Friday 26th June Peter braved the heatwave to share with us his knowledge of colour theory and how he applies it to the alchemy of mixing and applying paints. As ever, Peter was entertaining, honest and informative. His approach is not entirely text-book, derived as it is from 60+ years of experience. We all came away with some pearls of wisdom we can use that may just make all the difference. Thank you Peter,