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Gel color change
About 2
months ago, I decided to try my hand at a simple gel recipe for personal use,
which for a short while seemed like a success. The product initially looked
exactly like I imagined which was a transparent gel. I stored it in two
different packages, a 50
ml airless pump and a 5
ml plastic jar and all seemed well. However, after a few weeks, maybe 2, I
started to notice a slight color change. The product in the jar suddenly had an
orange tint to it while the product in the airless pump did not. Today the
color change is even worse; the gel in the jar has completely solidified and
the tint has turned into a burnt orange color. The gel in the pump is also
darkening as well at this point. Does anyone have an idea of what might be
happening? My main theory is that it’s oxidation but I’m not quite sure. I even
included disodium EDTA in the formula to combat just that but maybe it’s
present at a too low concentration. If it is oxidation which of the ingredients
is most likely to be the culprit?FORMULA:
Water 88.9 %Hydroxyethyl cellulose 1 %
Niacinamide 4 %
n-acetyl glucosamine 2 %
disodium EDTA 0,1 %glycerin 3 %
EUXYL PE 9010 (phenoxyethanol and ethylhexylglycerin) 1 %PROCESS: I started
by heating the water to 70 degrees and added hydroxyethyl cellulose while
mixing. After the gel hydrated and cooled to 40 degrees, I added niacinamide,
n-acetyl glucosamine and disodium EDTA, all of which dissolved nicely. For the
last step I premixed glycerin and EUXYL PE 9010 (phenoxyethanol and ethylhexylglycerin)
and then added it to the gel.
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