-
Clay mask question please: does this formula require a preservative (no water, yes oils & honey)
Hello and thanks in advance for a little guidance, I am new here! Just out of curiosity. My questions is about preserving a clay mask. I understand formulas with clay are notoriously hard to preserve. My plan is to use phenonip 1%. Any suggestions on usage rate and how to incorporate that into this recipe below is greatly appreciated, also other preservative options you can recommend! I am a soap maker (novice kitchen chemist) so please forgive the what is perhaps dumb questions! TIA!
On a side note: there is no water component in my recipe - so just curious, if not ever contaminated with water, in theory, would this recipe need a preservative? I want to share this with others in this paste form -
My recipe is (+ or -):
60% dry powders (clay, zinc, charcoal)
5% raw honey
10% oil
20% white willow bark glycerite
+ or - essential oils 3%
1% phenonip plannedI mix this paste with water at the time of application for a maks.
Or without added water as a spot treatment for blemishes.Again, Thanks in advance for any feedback or suggestions! Val
-
17 Replies
-
I would suggest you use a preservative.The 1% Phenonip is okay. -
I would say you need to, as honey still has some water content.
-
Thank you, that was a concern of mine, thanks for your comment!
-
Thanks for the recommendation that phenonip 1% is a good choice. Any suggestion on how to incorporate? Or concerns about the clay and preserving? TIA!
-
The Phenonip should go into the Oil phase:if not pre-mix with 1% polysorbate 80 and then add to oil.
-
DrBob, perfect thank you. I will use phenonip which is not pre-mix, Should I have concerns about clay being hard to preserve? Could you elaborate on that aspect of clay masks for me? At 1% can you estimate for me what I can expect from the shelf life, unopened? TIA!
-
Check C of A for microbial content should be <100 colonies/gram and no pathogens .No comment on difficulty to preserve clay masks.If you have have concerns run USP 51 and /or microbial content.
-
Great Thanks!
-
Some clays have high microbial counts.
-
After adding preservative you need to check the Preservative Efficact Test and based on that you can finalize the shelf life.
-
Thank you!
-
I read that Phenonip should be divided over both phases (e.g. 0.5% in water and 0.5% in oil phase).
I’ve also read that because of the amphiphilic character of phenoxyethanol it’s better for the stability of the emulsion to put the Phenonip in the cool down.@”DRBOB@VERDIENT.BIZ”
What is your opinion on this?Edit: I see the formula doesn’t have a water phase. :smirk:
I still would like to know Dr. Bob’s opinion though. 😉 -
@Doreen I think with PE based Phenonip if you have a water phase I would split and add half to water and half oil mainly due to solubility of parabens.I think adding it to the oil phase in this case should be hot and shouldn’t affect emulsion stability.
-
There is no water phase Bob, suggestions for me? TIA!
-
As I mentioned just add to oil phase!
-
Thanks Bob!
-
@”DRBOB@VERDIENT.BIZ”
Thanks a lot!! :+1:
Log in to reply.