U of S | Mailing List Archive | alt-photo-process-l | Re: Stock Paint:Gum Solutions?

Re: Stock Paint:Gum Solutions?

Hi Marek,

That's a bit confusing. When I measured my former mix (1 part gum + 3
parts water) some year ago when Chris asked us about our gum mixes it
turned out to be near 14 baumé. Now I use a heavier 1 part gum + 2
parts water mix.

As I have both concentrations at hand I just (re)measured both mixes
with my simple winemakers hydrometer.

these are the results:

My 1+3 mix has a specific gravity of 1.101 this is 13,3 baumé
My 1+2 mix has a specific gravity of 1.132 this is 16,9 baumé

You can lookup the baumé grades here: http://ilpi.com/msds/ref/baumescale.html

And some pictures from the lab: http://polychrome.nl/techlog/gum-concentration


On 23 okt 2008, at 16:40, Marek Matusz wrote:

I use 14 baume ready gum solutions (about 30% as I recall), so it is
the same as yours 1:2.