About the Cyanotype Sensitiser

Show here the different colour tones between fresh and expired sensitisers.

Application Stage
Left : Fresh sensitiser (overnight)
Right : expired sensitiser which I've kept for more than 2 years (5 mins later)

Upon Development
That's why my prints became so foggy and pale. See here.

Anyway, I am not going to throw them away as yet.  They are still useful for some uneven paper toning or intentional foggy prints as base for drawing.🤔