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banana_legs
01-12-2010, 05:15 PM
As an experiment, I coated and dried a sheet of glass with 6% gelatine (with a touch of isopropyl alcohol to help it stick) and then applied a standard 1:1 cyanotype mix. The gelatine softened and after much stirring on the glass of cyanotype mix and gelatine, I obtained a useful coating. I dried it with a hairdrier and then exposed it.

Here is the result, with a sheet of paper tinted slightly orange behind it.

Interestingly, in the highlight areas, the unhardened gelatine floated off (rather scary) but the bits that went blue seemed to have been hardened by the cyanotype formula. As a test to see if it was just UV hardening I coated some glass with gelatine only and exposed half of it to UV; all the gelatine floated off when I soaked the sheet so it must be a reaction due to the cyanotype. I repeated the cyanotype process on another sheet of glass and the same floating away of light areas happened so it does not seem to have been a one-off effect.

I am planning on dissolving the gelatine directly in the cyanotype mix and having another go....

Best regards,

Evan Attached files http://f295.f295.org/uploads/cyanotype_on_glass_3484.jpg (http://f295.f295.org/uploads/cyanotype_on_glass_3484.jpg)

taco
01-12-2010, 05:21 PM
Great to know that this works. I bought in the local Aldi a lot of canvas for a very sharp price but only at home discovered that it is coated! (Don't know with what)
But with this gelatine trick I hope that I can do something with it

doji1969
01-26-2010, 02:27 AM
great idea! 8)