I'm trying my hand at cyanotypes for the first time. I like the initial results, but I do have a few questions. Can anyone tell me what can be used to fix a cyanotype? also, I'm having a bit of trouble getting white whites with my prints. Besides it being the density of my negative, could there be a chemical step i could add in to bring the whites up? or perhaps more/less time? I'm exposing with bright sun. Thank you for any imput!