Quote Originally Posted by shinn
Is Dan Burkholder making PT prints over inkjet?

Is this right?: coat your gum/dichromate, expose but not processing it and then recoating it with PT/PD then processing? I'm not sure that any of the PT would get into the paper, I could be wrong though. It may even depend on the color of gum thats used. Also, gum prints tend to have some 3D qualities and they seem thicker before washing, that may affect registration.........? Sounds interesting though, I think you'd get a totally different feel and look to the print this way as well. Definately worth trying.

As far as shrinking paper, I do it at home while cooking or drinking a beer(s) watching tv. BFK rives, 6-8 sheets at a time. I do this three times: Hot water soak for 2 hours and dry over night, then I size and harden them all at once as well. Now though my third soak will be in Oxalic acid if I plan for gum over. (I'm not sure that I need the oxalic for Ziatype though)

I also have a question for you Jorge: I read here that you did not have very good luck with ziatype, why is this? I've done only a few to this point (15) and can't say whether its good or bad I know I like what I see so far though. Having done so many Argyrotypes which is also humidity controlled (even moreso) I felt this was the way to go, especially after realizing how nice it is not to do any test strips, not yet anyway. I'm using FAO(A), Potassium Chlorate/FAO(b), LIPD(c) and PT/AU at 5%, were you using Potassium Dichromate? I chose the chlorate version because it is closer to the traditional PT/PD process it will even develop out with Potassium Oxalate.

Wow thats a long one, sorry.

Happy Days
Mark
Yes Mark, although Dan calls them pigment over platinum, the actual procedure is reversed, you print the ink jet print first and then you coat with the platinum. He does this not because he wants to deceive people, but because the registration of the negative is easier to achieve if you print the ink jet portion first, at least this is what I was able to glean from what he showed me. I did not take the workshop, but was only observing while the students did their prints and asking questions, so I am not the most qualified person to comments on this, you can e mail Dan directly, he is very nice and I am sure he will answer your questions.

The problem with the Zias was the humidity for me, I use a platemaker and I think the heat from the lamp was drying the paper too much. If I tried to leave it a little bit more humid, I ruined the negative. I used the kit sent by B&S with the FAO, etc, etc. To tell you the truth at this point I have the DOP down to a science where I dont need to do test prints, so struggling with Zias does not appeal to me any more.

See, your shrinking process is what I am trying to avoid, I definitely have no patience for this. Even the pre oxalic acid bath is a PITA for me...lol.....I think I will order some gum and try it the way I am thinking. I am not so much concerned about the absorption as much as I am concerned about the contrast increase or even the lack of reduction of the pt/pd by the dichromate in the gum. Certainly if I was to do the gum, wash it, dry it and re coat with pt/pd, well that would give me the same problem as gum over pt....no? I think if I can save the intermediate wash step before recoating I would like to do some of this, if not...well I will be happy to see your and Clay's prints...