Quote Originally Posted by RalphLambrecht View Post
there is no such combination,but you can try a max cyan setting and check if that leaves you sufficient luminance to see the image. it should protect the paperadequadtly.
I don't think so. Paper is blue green sensitive.
cyan lets blue green through; it is minus red. it will thoroughly expose your paper. There seems to be some confusion between a red filter and minus red in this thread.