November 11, 2019: I had hoped to use cyanotype as a background for the gum bichromate process. I am looking for the flat, painterly quality that the combination creates. These processes are labor intensive and depend on UV exposure as a fixing process. As I live at about 45 degrees in latitude, sunlight is not reliable during the fall and winter months, I am using a very old (1960s) single-bulb sunlamp which I clamped to the rafters above my clothes washer in the basement. If the sunlamp works, then I can work on cyantype or bichromate at any time.
The sunlamp DID work and I am pleased. I purchased cyanotype chemicals on Amazan, and the two component parts are now mixed and in light proof containers in the basedment. I am using high quality water color paper (hot pressed 140lb). I don’t know why this happened, but I seemed to get some pooling of the chemicals on each of the sheets which created big blotches. I don’t know if I added too much fluid but suspect that this was the problem. These were just experiments, and I will try to prepare the other sheets more carefully.
My first efforts were under exposed. I added an additional 30% to the time and I think that these results are much better. I do wish that I could get rid of the haze that the overhead plastic leaves on the image. I may need to purchase some of the more expensive “negative” material designed for this purpose.