gelatin – Koraks tinkers

Aching, flaking – A persistent problem with carbon DAS highlights

The problem that just won’t go away: disappearing highlights on DAS carbon prints. Twice so far I’ve declared this problem solved on my blog, only to have to revoke my ‘eureka’ shortly afterwards. Over the past few weeks, I’ve been systematically testing the process to find a cure. So far, to very little avail, I’m afraid. But perhaps that this writeup will (1) help me re-think the problem and (2) it’ll give some hints to anyone else struggling with DAS carbon problems by listing factors that can/should be evaluated.

Subtleties – Subbing intermediate supports for DAS carbon transfer and a note on pigment prep

In my move to DAS instead of dichromate for sensitizing carbon tissues, I ran into a highlight retention problem. Thin gelatin layers (highlights and upper mid-tones) would slide off the temporary support material during warm water development. In testing, I identified exposure unit wavelength as a critical factor. However, the problem persisted especially in very high-contrast tissues. It seems I have now identified another part of the solution: a different way of subbing the intermediate support.

Making glop – and some words on sugar, glycerin and ink

Glop, gloop, pigmented gelatin – whatever you name it: it’s that pretty awesome looking slithery stuff that forms the basis of a carbon transfer image. Looking at liquid, bubble-free glop at the right angle is a bit like staring into a black hole. It surprises me Anish Kapoor never caught onto it, really. Anyway, today is glop-making day again as I’m running out of 8×10 tissue. I took some pics and will (probably) follow up next time with tissue-making.