This may be a little off topic... I have used photopolymer gravure plates in the past. I'm not sure but "Solar plates" should be different. I never seen one and I don't know if they are suitable for photography use. However I would like to try one anyway because I think they would be useful also for other things I like to make. I'm from Italy and I can't find a source for solar plates in Europe. If you know any online store selling solar plates in Europe please let me know. Thank you!