[Alt-photo] Re: DAS

[Alberto Novo]

One of them is me. I will give it a try with carbon and casein printing, and 
resinotype too, but the true main test will be with collotype. I am starting 
now with the traditional (dichromate) formula. 

Alberto 

Kees Brandenburg Scrive: 

> I was wondering if there are people on the list who participated in the DAS group buy that was organized some time ago. 
> DAS is the acronym for 4,4'-Diazidostilbene-2,2'-disulfonic acid, disodium salt, tetrahydrate and is a non- or less toxic replacement for dichromates in carbon printing. I am using it for some years now and am quiet happy with it. Most handy is the non existing dark effect. Carbon tissue can be made presensitized. This speeds up printing a lot.  
> 
> Recently I also tested it with casein and found out that it works extremely well!  I am looking forward hearing other people's experience with this powder! 
> 
> Kees
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Alberto
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