cream changes color - Chemists Corner

Formulating

cream changes color

Posted by MarisaLR on March 28, 2022 at 3:58 am

Hi. I’ve been having some challenges with color stability on this cream. It’s bright blue for a few days and starts to get lighter and eventually turns light gray after a few weeks at room temp.
Any ideas?
Phase A
avocado oil
squalane
cacay oil
olive m/Cetyl alcohol
Diplamitoyl hydroxyprolibe

Phase B
neroli hydrosol
colloidal silver hydrosol
Propanediol
meadowsweet in glycerin
hyaluronic acid small molecule
sclerotium gum
xanthum gum
Sodium phytate
Phase c

SF Complete

Bakuchiol-.

Ethyl hexylglycerin / phenethyl alcohol

Pea Peptides

Tri Peptide

Bacilus Ferment

Vitamin C (tetrahexyl Ascorbate) - •

Vitamin E

Blue Tansy.

Mryhh

l-ascorbic acid
ferulic acid

MarisaLR replied 2 years, 8 months ago 5 Members · 8 Replies
8 Replies

Graillotion

Member
March 28, 2022 at 4:39 am

Have you tried a knockout experiment?

I’d probably start with the Silver.

OMG…you have the whole wish list in there!

…and lots of bug food…and no mention of pH.

I’d lose anything with the word Leucidal, and work with preservatives known to work. Not sure if just phenethyl and EHG is enough for that formula.

It does take the percentages…for the group to really help.
Graillotion

Member
March 28, 2022 at 4:55 am

Guessing that ‘soaps’ pretty bad….might try a version with the Olive M in the water phase…and if you are not opposed to dimethicone…add a little of that.
Graillotion

Member
March 28, 2022 at 4:57 am

Please also list your packaging…as that comes into play with your ingredient choices.
Abdullah

Member
March 28, 2022 at 9:55 am

What is the pH and preservative amount?

It may not be enough for fungi
ketchito

Member
March 28, 2022 at 12:04 pm

With that variety of food for microbes, it might not be enough for some bacteria either.

@MarisaLR It’d be better to add an antioxidant for your antioxidants (especially for ascorbic acid) like a phenolic-based to quenche free radicals. Also, it might be worthy to add a UV filter.
MarisaLR

Member
March 28, 2022 at 1:25 pm

packaging is miron. 4% sf complete. .8% ethylhexyl : phenethyl alcohol. No soaping.

Ph 5.3
Microformulation

Member
March 28, 2022 at 1:28 pm

Your colloidal silver is being converted somehow to AgCl which is poorly soluble and has a black/grey appearance depending upon the concentration. It isn’t bringing any real benefit.

Ditch the SF Complete and use a better preservation system.

That long list of ingredients may seem “innovative” but knowing raw material costs/MOQ’s, it will be pricy to manufacture.
MarisaLR

Member
March 28, 2022 at 10:45 pm

Wow thank you everyone!!! I’ll circle back with outcomes.