Printout revisited
Posted: Fri Dec 16, 2022 9:15 am
Reading up again on using 2.5gms of KI in a liter distilled water solution as a printout preventer. It’s recommended as being the very last step before drying.
I’m using a Nick’s #5 for Agfa catechol developer w/ an FeEDTA bleach, followed by filtered water wash, followed by 4 step ethyl alcohol graded drying method and into drying cabinet (8E75HD plate). The alcohol steps are 50/50, 75/25, 90/10, and a “pure” ethyl spray. Getting very good results. However, not using potassium iodide printout prevention step.
What do you chemists out there think about mixing the potassium iodide w/ pure ethyl alcohol in a tray as a final step after the 90/10 step instead of mixing the KI w/ distilled water.
I would try it without asking for guidance but the pure ethyl is so damned expensive these days here in the US that I’m reluctant to waste a half liter if it’s a bad idea.
I’m using a Nick’s #5 for Agfa catechol developer w/ an FeEDTA bleach, followed by filtered water wash, followed by 4 step ethyl alcohol graded drying method and into drying cabinet (8E75HD plate). The alcohol steps are 50/50, 75/25, 90/10, and a “pure” ethyl spray. Getting very good results. However, not using potassium iodide printout prevention step.
What do you chemists out there think about mixing the potassium iodide w/ pure ethyl alcohol in a tray as a final step after the 90/10 step instead of mixing the KI w/ distilled water.
I would try it without asking for guidance but the pure ethyl is so damned expensive these days here in the US that I’m reluctant to waste a half liter if it’s a bad idea.