U of S | Mailing List Archive | alt-photo-process-l | RE: Carbon on glass with back exposure

RE: Carbon on glass with back exposure

Hi Marek.

Currently I can only pour gelatin in at nighttime since the average
daytime temperature is around 30C / 86F right now. But, since nighttime RH
is around 80%, gelatin will take very long to dry. (Daytime RH is around
40-50%.) Please note that I don't have an airconditioned workspace.
Anyway, I'll see how it goes...

BTW, I've made a simple .xls file to calculate / interpolate exposure
times under sun:


Those who are interested may donwload the file, see if there's any logical
/ mathematical error(s) + see if it works for them...


4 Temmuz 2008, Cuma, 6:59 pm tarihinde, Marek Matusz yazmış:
> Loris,
> I did not know about the local UV index value, should be quite helpful.
> I find the making of carbon tissue quite fascinating and easy to do. Glass
> is such a nice substrate for tissue as it stays flat and is quick and
> consistent to sensitize. Contrary to what you think it goeas quite fast
> once you get started. The limiting factor is how quickly the gelatin sets
> at your condition.
> The biggest think is use of jet dry detergent. It eliminates the bubbles
> from the gelatin mix and allows to pour perfect tissue every time.
> Keep us posted
> Marek