Hi everyone, I'm trying to formulate a body wash which will look milky. Can you advise me with below questions:?
1. I was suggested to use non-ionic emulsifier such cetearyl alcohol or cetyl alcohol and incorporate into the bodywash mixture with hot process. However it always fails, and resulting a sediment/layer. Do any of you have similar experience?
2. I will not use Glycol Stearate (pearlizer), because what I want is milky, not pearly liquid. Therefore after so many trial, I found Titanium Dioxide is good to give me this appearance. Is titanium dioxide not common to be use in a body wash? what is the impact in the long run? (Will it separate after several months?).
*Other successful trial, is by adding real milk powder, such coconut milk powder. However this as strong aroma which is not pleasant to the final product.
Thank you guys, I hope to hear your advise on using titanium dioxide in a bodywash

Warmth regards,
Vincent
Comments
Secondly, does adding yield value to keep the suspension means adding rheology modifier, such xanthan gum, or guar gum?
I see many cleanser (especially face cleanser, which is more like a paste) use titanium dioxide. In this case I'm assuming if titanium dioxide is also fine for bodywash product. Is this wrong? I'm reading some reference like as below:
https://health.howstuffworks.com/skin-care/cleansing/products/titanium-dioxide-in-cleansers.htm
Thank you again for your reply.
Actually, I tried Acrylates Copolymer (I don't know the trade name because retailers here just sell as it is). I tried up to 2%, and it gives slight bluish opaque (still translucent). I believe this helps particle suspension as well, but it just won't give that opaque/milk-looking appearance.
Is real milk (supermarket full cream cow milk) can be use in a bodywash? Will it stale easily and shorten my product life?
Thank you so much
I've also done body washes using milk (goat not cow in my case) and it does work but be prepared to use more and as a result a combination of highly robust and effective preservatives(DMDM, isothiazolones, etc). It will also have an accompanying odour which some may or may not mind.
About acrylates copolymer, yes I'm using only "Acrylates copolymer" which mean it is not Opulyn 301. Does it need neutralization? Actually it serve no purpose in my bodywash, but since it gives that murky/opaque appearance I decided to add 1%. (But again, I just add it into my water phase without neutralization). However this is my last options, as this formula still does not provide opaque appearance enough.
And for case where I add cow milk, I use 0.6% DMDM Hydantoin only for my preservative. (I'm following european maximum limit). Do you think its enough? should I add Potassium sorbate for anti-fungal effect?
What I understand is, when we add powder (particle), we need some rheology modifier such gums to help suspend it. However, in this case I'm using liquid drinking milk (from supermarket) at 10% to get the full opaque color that I want. Is this liquid cow milk still means particles that need to be suspend? Do you think this is way too much?
What do yo think if I use titanium dioxide to give opaque appearance? Does it makes no sense in bodywash?
Really appreciate your help
Why not use the pearliser but at higher concentration. I made an opaque face wash with Euperlan PK 1200 at 10%..not pearly
By the way, this is for bodywash (rinse off), so white rubbing effect should not be seen.
Thank you
TiO2 is likely to separate with time - although this will take long because it has very small particle size.
MICA is as well an option. You just need to disperse it. It doesn't need to be solved - and it also doesn't dissolve in oil. I mean: It is basically stone... Never heard this is soluble in oil...
Anyway - in case you want to work with the mentioned Acrylates Copolymer this shall help you stabilize any kind of dispersed particles like the TiO2 and MICA.
For the Styrene/Acrylates Copolymer you don't need stabilizer as the density of the polymer is close to that of the formulation which significantly reduces the risk of floating or settlement.
Glycol stearate (GS) is widely used both as opacifier and pearlizer. The difference is the manufacture of both: while in opacifiers you have GS randomly arranged, in pearlizers you have very organized sheets that effectively reflect light (due to a controlled mixing and cooling process). Lamesoft TM Benz if a good GS based opacifier, if you want to give it a try.