[Alt-photo] Re: DAS

[Kees Brandenburg]

Hi Marek,

I did a quick step tablet test with the group buy DAS. I don't see any of this highlight clipping you are observing.

http://polychrome.nl/techlog/apug-group-buy-das

Kees



On 27 apr. 2013, at 03:39, Marek Matusz <marekmatusz at hotmail.com> wrote:

> Kees DAs was added to the glop at 6% basis dry gelatin I am including scans of my test prints and a perfectly normal dichromate sensitized tissue with typical nice gradation of tones. I have done a 3 minute and 6 minute exposure of DAS sensitized tissue and you can see the expected density shift, but the effect is still there. I am almost thinking it is some kind of side reaction with some chemical that is in my glop mixture. I am making just sugar/gelatin/pigment DAS tissue. ANy ideas of how to go next (less pigment/DAS?). To that effect I flashed the tissue and it seems to have done the trick. My flash was a bit too long (at 1sec), because it fogged the print too much, but it definitely gave me more gradual tone gradation, actually the contrast is way too low as it would requitr negative of logD of over 3https://plus.google.com/photos/105732508998271877151/albums/5871332081567167153?authkey=CLvJ1J76nZjjhQE Marek