I've been meaning to try doing my own, and bulldog clips sounds a much better solution than the frame. I was a little surprised Photography on-line didn't name the chemicals needed, and even had their versions labelled in French. I've got 100g of one of the reagents (ammonium ferrrocyanate IIRC) & will eventually get round to ordering the other. I'll dissolve them up myself.Nope, just a an old picture frame. I sandwiched the coated paper between the glass and the backboard with some small bulldog clips and left them out in the sun for an amount of time, worked perfectly. I bought the paper ready coated but if I do it again I'll get the chemistry and coat my own.
King’s policy of ‘separate development’ can, however, justly claim one
advantage: an increase in printing speed. In a conventional mixed
cyanotype sensitizer the ferricyanide ion inevitably absorbs some of the
actinic blue and UVA light non-productively, owing to its strong
absorption band peaking at 420 nm, which thereby lowers the sensitivity
Yes, something like this might be the way to go. I'm not sure that 7-14W output will cut it though.perhaps look at something more like the UV resin print hardening lamps that are based on LED Cree emitters...
say something like this ?