Gord,
Yupo is great for casein in that it doesn't seem to stain, but as you
found out was very hard to coat evenly.
Did you use a fan brush to try smoothing it? That works OK with smaller
prints, hard to do with larger ones.
You can use more pigment to get a deeper color. You'd be surprised how
much more pigment you can put in, compared to gum. Oops, I hope we
don't stir up discussion on pigment stain again.
Sam
On Feb 6, 2006, at 6:41 PM, Gordon J. Holtslander wrote:
> Hi:
>
> Bought some Yupo paper. Tried doing casein dichromate printing on it
>
> It shows some promise. The casein bonds/hardens onto the yupo - but it
> doesn't appear to hold much pigment. prodcued a very flat image -
> flatter
> than gum. The unhardened casein/pigment disolvers away cleanly though
>
> used 10g casein (scientific grade powdered casein) to 70 ml water & 30
> mls
> ammonia.
>
> Does not coat nicely though - it just tends to pool onto the yupo
> paper -
> I think when I coated it, I wiped off most of the mix just to get an
> even
> coating.
>
> Will try a higher concentration of casein.
>
> Tried using casein and gum - but the mix flaked and bubbled off when
> processed.
>
> No preshrink or sizing - and dries in a few minutes. Nice and quick -
> if
> I can figure out a good coating technique.
>
> Gord
>
> ---------------------------------------------------------
> Gordon J. Holtslander Dept. of Biology
> holtsg@duke.usask.ca 112 Science Place
> http://duke.usask.ca/~holtsg University of Saskatchewan
> Tel (306) 966-4433 Saskatoon, Saskatchewan
> Fax (306) 966-4461 Canada S7N 5E2
> ---------------------------------------------------------
>
>
Received on Tue Feb 7 08:12:56 2006
This archive was generated by hypermail 2.1.8 : 03/13/06-10:42:57 AM Z CST