Hello,
I’m working on preserving a skincare cream with naturally derived preservatives and was wondering if anyone can offer some advice on promising combinations for a face cream in a glass jar (open container…yikes!) I've been reading a lot of threads on this website, which have been a huge help, particularly for highlighting how tricky it is to preserve a product with Ecocert/naturally derived preservatives.
I have a couple of questions for the formula below. I tried Leucidal Liquid at 4% with potassium sorbate at 0.5%, but the cream started to smell bad after two months. I’d like for it to last about a year.
Some questions...
- What is the likelihood Natapres (Glycerin, Leuconostoc/Radish Root Ferment Filtrate, Lonicera Japonica (Honeysuckle) Flower Extract, Lonicera Caprifolium (Honeysuckle) Flower Extract, Populus Tremuloides Bark Extract, Gluconolactone) at 2.5% plus potassium sorbate at 0.5% will preserve this cream in an open container for about a year?
- Is it worth combining Natapres with other preservation products such as sodium benzoate or glyceryl caprylate for extra preserving power?
- Faced with choosing between Natapres+sodium benzoate, Benzyl alcohol+DHA, gluconolactone+sodium benzoate, which is likely to work best for a glass jarred product? Any other suggestions?
Thank you for any advice!
Here is the face cream formula -
Formula (ingredient followed by percentage):
OILS (24.5%)
Shea 9
Cocoa Butter 1.5
Grapeseed oil 5
Rosehip Seed Oil 3
Jojoba Oil 5
Borage Oil 1
WAXES & EMULSIFIERS
Milliard ewax 5.5
Beeswax 0.5
WATER
Aloe vera gel 15
Water 46
Vegetable glycerin 2
BOTANICAL EXTRACTS
Alcohol tincture 3
ANTIOXIDANTS
Vit E 0.1
Rosemary oleoresin extract 0.05
PRESERVATIVES ???
Comments
I'd say, no likelihood at all. If you want to do this you will have to use a hurdle system and a preservative such as KEM NAT.
You might want to look into Laurest 1220
But I've tried it in the past and couldn't mask the scent of the Benzyl alcohol so am looking into alternatives...
BobzchemistMicroformulationDRBOB@VERDIENT.BIZ
Of the options you have listed, you might try:
(1) Chealating Agent 0.2% (Dissolvine GL47 or perhaps Sodium Phytate)
(2) 1,3-Propanediol 6%
(3) Gluconodeltalactone + Sodium Benzoate 1.5%
(4) Glyceryl Caprylate 1.0%
Make sure your final product pH is <5.5
See website for details www.desertinbloomcosmeticslab.com
and @Belassi I'll see how the alcohol tincture content affects my product - so far I've included 3% with pretty stable results over time.