[alt-photo] Re: Egg-tempera as primer for impermeable surfaces

[Loris Medici]

Yes, I've experienced this with gelatin+calcium carbonate mixtures but it
wasn't on aluminum; it was on Yupo - the usual substrate for temperaprint
process). And yes, I know Yupo's "a little bit" more flexible than thin
aluminum sheets! Hehehe...

See this for egg-tempera:
http://www.eggtempera.com/technical-info/egg-tempera-paint

Regards,
Loris.


-----Original Message-----
From: alt-photo-process-list-bounces at lists.altphotolist.org On Behalf Of
Keith Gerling
Sent: Thursday, September 30, 2010 3:30 PM
To: The alternative photographic processes mailing list
Subject: [alt-photo] Re: Egg-tempera as primer for impermeable surfaces

Loris,

You experienced cracking with gelatin?  Streaking, maybe (and the reason why
I double coat), but I've never seen cracking.  In fact, the surface is so
hard that I find it impossible to remove remove from the aluminum.

I haven't followed any threads here - only bursting in when my name was
mentioned.  How is the tempera prepared?

On Thu, Sep 30, 2010 at 7:15 AM, Loris Medici <mail at loris.medici.name>wrote:

> Thanks,
>
> That didn't work for me the way I like it; I want a streak and crack 
> free surface and - relatively - quick operation.
>
> Now, tempera's interesting (and I'm going to try it) because it's very 
> sticky, dries very fast and can be hardened w/o dichromate or 
> formaldehyde; I plan to use isopropyl alcohol to harden it. (A liter 
> per USD 1.50 here and I plan to recycle many times...) Sounds pretty 
> practical - if it happens to work, of course!
>
> Regards,
> Loris.
>
>
> -----Original Message-----
> From: alt-photo-process-list-bounces at lists.altphotolist.org On Behalf 
> Of Keith Gerling
> Sent: Thursday, September 30, 2010 3:05 PM
> To: The alternative photographic processes mailing list
> Subject: [alt-photo] Re: Egg-tempera as primer for impermeable 
> surfaces
>
> Hi Loris,
>
> I have not tried egg tempera.  The gelatin mix I use has served me well.
> Mix is up as if you were going to size paper, but include the marble 
> dust and apply two coats.