[CarlJen]

Thats brilliant Mark thank you.

I have now read MakingSkincare’s overview of Preservatives on her site, its excellent and highly recommend it to anyone starting out. I will now be adding 0.5% sodium benzoate to the formula as recommended.

Mark, I have 2 different weights, one large and small and one with encapsulated multi chain, just want to see if there is a notable difference between them.

[CarlJen]

Thank you for the comments and all the great info. I agree there is a huge amount to take into consideration when preserving a product and if i go further and wish to create one for resale to the public I will employ a real chemist and have all the test done. But for the moment this is only a personal study and i simply want to test the different HA`s i have to see if there is any notable difference between them, the test should take no more than a few months thats why the 0.5% preserve.

[CarlJen]

Thanks for the link but I already did the basic research of several preservatives and decided this one is best for me. I know the recommend usage range is 0.5-1.15%
so after more research i came to the conclusion of 0.5% is the figure i needed i just wanted to check on here that my conclusion is correct or i should go and do some more research!

[CarlJen]

Excellent thank you Perry and Bob for clearing that up.

MakingSkincare the powder was Colloidal Oatmeal and there are a few other liquids in the formula but i just needed to get my head round the need or not need for the bulk density issue.