U of S | Mailing List Archive | alt-photo-process-l | Re: gum preservatves

Re: gum preservatves

Wow, that's very little! That's about 1/3rd of the max. concentration
allowed by FDA. OK, then a final concentration of 0.1% (instead of 1%)
should be plenty for the next batch. Thanks.


4 Eylül 2008, Perşembe, 6:09 pm tarihinde, kerik@kerik.com yazmış:
> I make my gum from powder using about 300 gm to make a liter. I preserve
> this by adding 3 ml of a 1% solution of sodium benzoate per liter of gum
> solution. I've been doing it this way for the last 7 or 8 years and it
> works well for me. It lasts a long time and no souring or barfy smells.
> Kerik
> www.kerik.com