Gum Arabic Preservation Hello any experts! I posted this on DPUG without response maybe my luck is better here. I would like to make my own gum arabic of which I bought 300gr. of powder like crystals ( thought they would give me chunky stuff but evidently this is the way it is sold now). On scanning many pages on various websites I understand that the mixture needs to have a preservative/fungicide added. I have essential oil "Tea Tree" and would like to know how many drops to add (diluted in alcohol). Listerine is also available but not the old type. My crystals I understand 300gr to 1 litre of water is this okay? Any light on the matter will be much appreciated and sorry if this has previously been discussed. Thanks!