[Ron_93]

Roger that! Thank you.

[Ron_93]

Hi Jasmine,

I too have a science background (BS in Biological Sciences). I did the advanced certificate in cosmetic science. I thought it was a good program and worth it. Very hands on and your science background will help you understand the information to its entirety. Best wishes to you and your endeavors.

[Ron_93]

Thank you so much! I’ve been shooting for a pH of 4.5. Pretty much replicating the aussie conditioner. I have some here as a benchmark and the pH is at 4.53. However, they utilized glutamic acid as their buffer based on the LOI

[Ron_93]

Roger that. I actually was heating to 75C and then adding phase B. I will increase temperature and mix under low shear. Thank you so much.

[Ron_93]

@PhilGeis

Hi Dr. Geis,

Would love your opinion on Optiphen ND (Phenoxyethanol (79.0-81.0%), Benzoic Acid (11.5-12.5%) and Dehydroacetic Acid (7.7-8.3%)) as a single system or would the combination above be a better suited option?

• This reply was modified 1 month, 3 weeks ago by  Ron_93.

[Ron_93]

Great explanation as usual! Thank you so much!

[Ron_93]

I see, got it! Thank you

[Ron_93]

Hi Perry,

Thank you, Perry. I guess the “liquid” part kind of threw me off being that the type wasn’t specified. I appreciate your help.

[Ron_93]

Yes, that’s where I seen it and was utterly confused. I seen a chemist add it post emulsification under low shear. I figured that was the correct way to avoid breaking the network. Thank you for confirming.

[Ron_93]

Got it, thank you!

[Ron_93]

Hi there. Since sodium carbomer comes pre-neutralized, should it be mixed under high shear for a brief period of time while adding the oil the phase?

[Ron_93]

@evchem2 Hi there. I actually tried what you linked but get fish eyes when mixing the powder with water. Any reason why? Is there a specific type of sodium alginate that should be used? Thank you for your insight.

• This reply was modified 8 months, 2 weeks ago by  Ron_93.
• This reply was modified 8 months, 2 weeks ago by  Ron_93.

[Ron_93]

Roger that. Thank you for the info.

[Ron_93]

Yes

[Ron_93]

Yes, it will be for human use. They will only be adding the SPF component to the formula, but not actually mass producing it. I would have to source a CM for production.

[Ron_93]

Great insight! Thank you.

[Ron_93]

Hi @philgeis,

I noticed you mentioned the shampoo, but I am curious about the conditioner. What preservative system would be sufficient for a hot pour or powder water-activated conditioner such as the product listed above? I think the single-use packaging verbiage is great, but what if a consumer decided to keep the remaining hydrated conditioner despite the label stating “single-use, discard after use.” Thanks for your insight.

[Ron_93]

Whoops, good catch! I mean practical, as there are practical assignments that require students to formulate products.

[Ron_93]

Yes, has been for a few years now.

[Ron_93]

Haha. Preservative guys are the most important people in my opinion. Thank you for all you do. Take care.

[Ron_93]

Roger that! Thank you so much. I have lactic acid here. Would that be a better buffer option given the formula?

• This reply was modified 1 year, 1 month ago by  Ron_93.

[Ron_93]

Hi Phil,

Thank you for your responses. Yes, I was considering dropping the pH to around 4.8 or so and switching to Euxyl K 703 (INCI: Phenoxyethanol (and) Benzoic Acid (and) Dehydroacetic Acid).

Euxyl® K 703 contains:

• Phenoxyethanol 78.0 - 84.0%
• Benzoic Acid 11.0 - 13.0%
• Dehydroacetic Acid 6.5 - 7.5%

I am definitely open to suggestions. Thanks brother.