Quote Originally Posted by chrisaisenbrey View Post
I think it is time to reanimate this old fantastic thread:

Diazo/DAS is also used replace dichromate in Collotype

Since Iíve access to a photo spectrometer I made some absorption spectrum of DAS in water. It has a maximum around 333nm.

This is very good news! And your site is very impressive too. Did you observe sensitivety differences or the need to adapt your negatives with DAS compared to dichromate?
And thanks for the spectrometer data.