GumDichro Prints.

[ced]

Does anyone have experience with exposing under UV Cyanotypes and GumDihcro prints?
Which exposures are the shortest for Diginegs on OHP?
I seem to be able to keep only the extreme highlights whether I expose 15mins or 45mins at 45 the HL area starts to fog so it seems to me that probably 15mins was already too long.
My Cyanotypes needed 40+mins to be okay. I am new to Gum Printing and somewhat puzzled.
Thanks!

 

[Herzeleid]

According to my very limited gum print experience,they require shorter exposure times than cyanotype.
I do 7-8 minutes for cyanotype, 2-3 minutes for single layer gum.

 

[ced]

Herzeleid thanks for the rapid response! Is there any advantage to give a double coating to the paper before exposing?
Thanks again.

 

[Herzeleid]

I have no idea if there is something to benefit from double coating gum. I have very limited experience with gum. Other people might help you with that.
If you double coat cyanotype, you would get slightly increased dmax and contrast, I personally think it is not worth the effort.

 

[ced]

Herzeleid Great, Thanks! If anyone else does have some info regarding this I am all eyes...