I'm submitting a series of watercolours to DA in large format as prints. I've been printing my drawings for a number of years now at home, I've a number of printers and can print up to A1. I experimented with different papers, the best was Lyson, but discovered different coatings for archival printing and now make it myself. I try to keep the prints out of direct sunlight when they're framed, here in Thailand the sun is very bright all day, even when it's cloudy. After 4 years, there's no change in colour so I feel I can continue to offer them for sale. I've one shape I like for frames, and keep to that. I'm currently trying to find a wood factory to make some more for me. I seal the glass in the frame with Silicon and brown paper tape at the back to stop tiny insects finding their way in and causing havoc. Helps protect the paper and ink from humidity too it seems.