[keesbran]

Its works well on gum too (DASGum Process?).

Charles

Hi Charles,

After reading this I did my DASgum test again by mixing a regular 14 baumé gum pigment mix 1:1 with a 3% DAS solution. Normaly I mix this 1:1 with a 10% potassiumdichromate. With several exposure times longer and shorter than my regular 4 minutes I never could make the gum harden and hold the pigment. Gum is different than other colloïds being a polysaccharide. As I have understood the hardening in the gum process is of the complex forming kind as in proteïn based colloïds the DAS hardening is of the free radical type. But correct me if I'm wrong.
For the gummist there is hope too. I am currently testing DAS with several synthetic colloïds and one of these looks very promising. It's even cutting down exposure times in a dramatic way. Only how to call this new approach...
I will post about this and other non-toxic pigment colloïd methods on zerochrome.org in the near future. So maybe I should coin zerochrome for the newborn.

regards,

kees