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Color Change In Sugar Scrub
Hi All,
I was wondering if someone could give me some insight.
I have a sugar body scrub made vegetable glycerin, propylene glycol as the main base and notice that the colors darken over time. Can someone explain to me why this is happening? And if there’s a method to prevent it or should I just accept that?
Thank you all,
Doaner
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11 Replies
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We need to see a list of full ingredients. It could be mold on the sugar, it could be oxidization, who knows.
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Sucrose, Propylene Glycol, Glycerin, Polyacrylamide and C13-14 Isoparaffin and Laureth-7, Benzyl Alcohol, Dehydroacetic Acid, Fragrance, FD&C Blue 1, FD&C Red 33
Although, a slightly different formula with no PG has been use prior with the same issue.
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Dehydroacetic acid!
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What does that mean, @Belassi ? Just so you know… the other formulation we use doesn’t use Benzyl Alcohol / Dehydroacetic Acid, it has DMDM in there.
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Because that preservative is absolute crap. EASILY ruins products. I’ve tested it.
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Well that’s encouraging, but I appreciate the feedback. It’s the customers formulation and they wanted to use that when we duplicated their reference. Any other suggestions on why that color is darkening since we’re also seeing that in different (but similar) formulations.
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It’s up to you how much time you want to waste.
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I certainly don’t want to waste time. I’m looking for different scenarios as to why this is occurring and I’m not convinced the preservative is the culprit. Thanks anyways for the input, I will definitely test this theory out @Belassi and see how we can improve our products.
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If in doubt, knock it out!
Do multiple variations, removing an ingredient from each to see which of them that does not discolor - by the looks you have no water added, and if kept dry you shouldn’t worry about the preservatives for the knock-out
Another thing, approximately how long does it take for the color to change significantly? Days, weeks, months?
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Hi @Sibech! Yes, that’s the only way. I wonder if it’s just the color not stable, which have a light fastness of 4 (that’s medium from this chart I have).
It takes about 30-90 day to take notice. From left to right days in julien are:
039 - 134 - 166
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@doaner12, Does it get darker before going bright or is it just the light in the image?FD&C Blue #1 (Brilliant Blue FCF) isn’t particularly light stable but much more stable in anhydrous formulations than aqueous.Have you considered using lakes instead of the dyes?
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