U of S | Mailing List Archive | alt-photo-process-l | RE: Casein

RE: Casein

  • To: alt-photo-process-l@usask.ca
  • Subject: RE: Casein
  • From: ender100 <ender100@aol.com>
  • Date: Fri, 22 May 2009 15:25:18 -0500
  • Comments: "alt-photo-process mailing list"
  • Delivered-to: alt-photo-process-l-archive@www.usask.ca
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hehehehe good one!
On May 22, 2009, at 3:21:19 PM, "BOB KISS" <bobkiss@caribsurf.com> wrote:

From:"BOB KISS" <bobkiss@caribsurf.com>
Subject:RE: Casein
Date:May 22, 2009 3:21:19 PM CDT

No silly, the Caseins were rolling along (as in “Over hill, over dale, all along the dusty trail…)!


From: ender100 [mailto:ender100@aol.com] 
Sent: Friday, May 22, 2009 3:34 PM
To: alt-photo-process-l@usask.ca
Subject: Re: Casein


Was the casein from free-range cows? hehehehe

On May 22, 2009, at 2:06:42 PM, "Loris Medici" <mail@loris.medici.name> wrote:


I did my first casein trial yesterday evening, w/o any success. See below:

- 0.8g casein (Kremer's)
- 5ml tap water
- waited 10 minutes (to let casein absorb water - I'm not sure if that's
necessary but did so anyway, I was not in a hurry...)
- added 8 drops of 25% (910) ammonia (it seems to be a lot, will try
halving the amnt. next time)
- I mixed the slurry (cream consistency) until it looks homogeneous
- I added 5ml of 5% ammonium dichromate (it turned to yellow - because of
excess alkalinity I presume...)
- I mixed the solution (not a slurry anymore, pretty homogeneous looking
solution slightly less viscous than my usual gum coating mix)
- made up a coating solution by adding the dichromated casein solution to
a very small amnt. of W &N acrylic color (burnt umber)
- coated the paper, dried with a hair dryer, humidified the paper with an
ultrasonic humidifier, exposed for 2 mins. under a bank of UVBL tubes (I
didn't get a dichromate image after exposure)
- developed(!) face down for 20minutes

I got absolutely no development, no pigment coming off, no dissolution of
binder at all.

What could be the cause?

Overexposure? Using acrylics? (But I know someone - Guido Ceuppens - who
uses acrylic colors with casein...) Both? Any other thoughts?

Will try with only 30secs exposure tonight...

Regards & thanks in advance,


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  • References:
    • RE: Casein
      • From: BOB KISS <bobkiss@caribsurf.com>