Re: Beer coating
Dear Loris,
Just be back in one week .. hope i can help you then,
Cheers, Henk
On 30 mrt 2009, at 22:58, Loris Medici wrote:
Dear Henk,
I tried beer coating tonight on a thoroughly cleaned and dried plain
aluminum sheet. Unfortunately the coating washed away in the cold
water
bath. What could I have done wrong?
1. I opened a can of Pilsener and let it sit in the fridge for 24h
2. I took 100ml of the can and waited to normalize to room
temperature (21C)
3. I mixed 1g of caustic soda (NaOH) into the beer
4. I mixed 10ml of sodium silicate into the beer
5. I stirred thoroughly
6. I immediately brushed the mixture onto a clean sheet of
aluminum using a
foam brush
7. I dried using a hair dryer in the middle setting
8. For the sake of getting an even primer coating, I coated the
sheet once
more with the primer
9. Same as 7
10. I washed the sheet gently rocking a tray
The coating dissolved and left the sheet during step 10. BTW, FWIW,
when
you put the sheet into water you can hear a fizzing sound (but
can't see
any bubbles)...
???
Thanks in advance,
Loris.
P.S. I couldn't manage to coat the Forex sheet with beer + silicate.
P.S.2. If I can't make it work, will try to put plain acrylic gesso
(which
doesn't hold gum by itself) on the sheet, sand and then coat it
with beer
+ silicate
P.S.3. I prefer to be able to coat the sheet w/o any acrylic gesso
since I
plan to buy white painted (enameled?) aluminum sheets later -> I
just want
to skip the whitening step for relatively conventional photographic
prints...
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