U of S | Mailing List Archive | alt-photo-process-l | Re: Diazo Photo Emulsion Chemistry & Gum Printing

Re: Diazo Photo Emulsion Chemistry & Gum Printing

  • To: alt-photo-process-l@usask.ca
  • Subject: Re: Diazo Photo Emulsion Chemistry & Gum Printing
  • From: Jack Brubaker <jack@jackbrubaker.com>
  • Date: Sat, 31 Jan 2009 10:03:35 -0500
  • Comments: "alt-photo-process mailing list"
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As I recall once did a screen with a bichromated gelatine coating that worked fine but, as you say was the end of that screen since I knew of no way to clean it out. 

Jack

On Sat, Jan 31, 2009 at 2:10 AM, redrocket <redrocket@cox.net> wrote:
Greetings!
 
I have all my gum chemistry, etc. I understand Diazo type photo emulsion is very similar for screen printing. That the sensitizer is plain old Potassium Dichromate. I'd like to experiment. Any ideas the emulsion part is made of? I'm wondering if I could just sensitize some heavier gum solution and coat a screen? Some one alluded to the emulsion being more of a glue. I guess the final step would be a emulsion remover. I'm guessing the sensitized gum hardened on the screen would be impossible to be removed? What ever the base of the Diazo emulsion once hardened, can be dissolved or removed.
 
So any advice from those with more photo chemistry knowledge would be appreciated.
 
Sincerely
 
Max