Im fairly new to cyanotype printing. I purchased the New Cyanotype dry chemical kit from photoformulary and was down mixing it up..... following all the instructions like a champ...... except I made the mistake of adding the Citric Acid powder to the 30ml(+/-) solution. Everything else was done exactly right..... just somehow ended up adding the citric acid at the end for some reason.... brain fart I guess. here is what the PDF file list the citric acid as doing.... CLEARING AGENT The addition of a solution of citric acid to the sensitizer just before coating will greatly speed up clearing of the image. First, make a 40% solution by adding the packet to enough water to make 25 ml of solution. Add one drop to each 2 ml of sensitizer solution for each print. Keep this additive separate from the sensitizer because when combined it will shorten its shelf life. in adding the citric acid accidentally to the stock mixture have I inadvertantly RUINED my $20 introduction to Alt processes? confusedly yours, scooter "the mistake magnet"