U of S | Mailing List Archive | alt-photo-process-l | Re: concentration of 14 baume gum arabic

Re: concentration of 14 baume gum arabic

Hi Dirk-Jan,

I have been mixing my own gum from lumps in a 35+100 (gum+water) ratio for years. When using lumps you can filter the solution by binding the lumps is a piece of cheesecloth and hang this in a jar with water. I am using a cheap winemakers hydrometer to measure specific gravity. A sg to baume conversion tool can be found here: http://www.ilpi.com/msds/ref/baumescale.html . This gum mix is at or around 14 beamé when measured! I tend to use a more concentrated (1+2) solution now.

I buy my gum in the netherlans at peter van ginkel artsupplies: http://www.petervanginkel.nl/index.php?id=1645


On 3 sep 2008, at 12:50, Dirk-Jan Treffers wrote:

Dear list members,

does anyone know what concentration of (powdered) gum arabic in water
most likely will come close to 14 baume gum arabic that you buy in art
supply stores?
I've searched on the internet, but could not find a direct answer.
Maybe anyone here can help me out? I'm getting a bit sick of paying
rediculous prices for very small bottles, and have 1 kg of powdered
gum. When I mix it in a 1:1 ratio, the gum looks far more dark that
the regular solution, and I'm afraid that will taint my final

Anyone have any ideas on this matter?

thanks in advance!