Doaneventry
Forum Replies Created
-
@Bill_Toge My supplier has a “cheat sheet” and it shows D&C Red 30 to be insoluble in all the polar solvents shown. I’ll sample it and see if that is really the case.
@ozgirl I have not. It seems like this is designed for food usage. Is this okay in cosmetics?
-
Today I was looking at some of the lakes I had sampled. I notice the D&C red 30 Aluminium lake was a bright pink (something I needed). I knew lakes don’t ever dissolve in water, so I thought maybe this will disperse well in a surfactant and then try mixing the surfactant color mixture into water. I used P-20. It worked.
I tried quick experimental mixtures with the red 30 lake with blue #1 or Violet 2. The color I needed worked for Violet # 2.
1 issue I had with this is that breaking down the red 30 lake pigments was very difficult. I don’t really work with lakes, but I guess you normally have to mill lakes to even disperse them? I thought maybe if I had place the red 30 lake pigments directly into the sugar scrub the sugar will grind down the lake itself through mixing ~ it worked. However, I don’t have the means to do this if I were to put this color mixture into a lotion.
2. Violet #2 still re-agglomerates.
This would all save me so much time if a pink dye exist
. -
A lotion, sugar scrub, and a mask; hydrophilic systems. I have used Blue #1 with all of the water soluble FD&C Reds. The only time I was able to produce a bright purple was using red #3.
I am currently experimenting with D&C Violet 2 EXT, but its solubility in water is not so great. I would make 0.002 g/ml solution of D&C Violet Pigments in water. Even after hours of mixing you can still see lots of agglomerates of the pigment at the bottom of my beaker. I’d pipette the top layer of this solution which shouldn’t have agglomerates, to a desired amount into my sugar scrub base. The sugar scrub is mostly glycerin. After a day of letting it set you can see specks of what i presume would re-agglomerate of pigments forming spots in the product.
-
@Belassi
HLB value of oil phase is 9.53. I am really unable to do much with my emulsifiers. It’s actually a blend of 50% glyceryl stearate and 50% peg-100 stearate flakes, whose hlb together is 11.I tried to adjust the ingredients amount to be close to 11 as possible while trying to make the lotion look and a certain way per client request.
Does it matter that much if the hlb value of emulsifiers is off by 1 or 2?
-
@Belassi @johnb @Chemist77
I tried increasing the emulsifier levels to 3% and then 6%. and the black residue still comes out after rubbing in the cream. -
Do I need higher levels of my emulsifiers?
-
I made a run without EDTA, and then Added EDTA because I thought I had an electrolyte problem. I do not believe EDTA is the problem.
-
Water, 70.0%
Glycerin, 8.0 %
Caprylic/Capric Triglyceride, 5.0%
IPM, 2.0%
Cetyl Alcohol, 3.0%
Stearic Acid triple beads, 2.0 %
(Sodium polyacrylate60%, hydrogenated polydecene35%, trideceth-6 5% mixture), 2.40%
Disodium EDTA, 0.10%
Glyceryl monostearate, 0.5%
PEG-100 Stearate, 0.5%
SunFlower seed oil, 4.0%
Benzyl Alcohol, Dehydroacetic Acid mixture, 0.4%
Fragrance, 1.0%ph ~ 6.5
