Thanks, Lukas! I was just throwing out ideas, taking into consideration mooseontheloose's location and ease of finding material. Tween would work better, but PhotoFlo might also work and be available to her.
What is good to use to acidfy the first water wash? And how much per liter?
I use 40g per litre of citric acid for the first wash(around 1-3 mins), you do have to change the first bath quite a bit but CA is cheap if up by in bulk, i.e 5kg. Personally Cyanotype II gives me significantly deeper blues than the original as Lukas mentions, attached is an example showing the difference between using a citric acid for the first bath and not using one. CA on the right.
Last edited by Davec101; 02-04-2009 at 11:53 AM. Click to view previous post history.