theese are the 2ml/50ml glop wedges, 2ml=~0.69g diazo, I made a mistake there. The 20minute 4ml/50ml wedge is very similar to #3 wedge above, slightly paler. I want to try printing with a lower concentration of diazo in the tissue when I get a chance to make more.
It needs more exposure to get the black I get through pictorico with 8min and 2%AD. I will try my last strip of 0.69g/50ml glop with a 35 min exposure and see. Dmax is no problem with colour like Tod Gangler or multiple transfer like Gordon Chapple, to me it seems a small price to pay for the health and environmental benefits, multiple transfers open a whole new world of creative possibility so it may actually be an advantage.
It transfers very easily and I have had no problems really.
I didnt get the MSDS and have no idea what is in the sensitiser, but my gut feeling is that all of their granular sensitisers are the same and the number is used to refer to different weights of diazo, they must be using diazo concentration to control contrast, so different numbers probably only refer to different diazo concentrations in the final mixed emulsion. I could be wrong though.
ok 35 min gets me another stop but still not a black. the good news is that it seems to still react fairly linearly with a stop of exposure giving a stop on the wedge, there is really only a stop and a bit left before I run out of stepwedge. I will scan the wedge when it is dry.
The bad news is that the kiwo ulano screen printing agents here in NZ are unable to supply me with the sensitiser on its own, I even gave them links to my carbon prints and others on unblinkingeye and colourcarbonprint.com and Sandy Kings article and Tod Ganglers videos so they know what I am up to.
Last edited by mdm; 07-13-2011 at 07:58 PM. Click to view previous post history.