[naturalformulator]

I have talked to Microbiologics, and found out that Epower™ can be a good solution for my needs. Available in concentrations ranging from 10E2 and 10E8 CFU per pellet and is offered at $38 per pellet. 

My goal for this is to not need cultures that needs maintenance to reduce costs required to personnel.

I think doing our own  PET testing as part of our already in-house stability testing reduces research time for new products, and speeds product launches, as well as improve safety of the products. For example I can retrieve parts of the Schülke koko test, in addition to the implementing of ISO 11930. This way I can test the efficacy of the preservative effect, but also the efficacy in the long term through detailed stability testing. 

I will let you guys know my experience and the over all costs once I get started. 

[naturalformulator]

I don’t agree with you Mark. For example testing batches in-house is very cheap. We use Compact Dry plates that easily speeds the test times and reduce preparation times. They cost $4 each and covers testing on Pseudomonas aeruginosa, Staphylococcus
aureus, Candida albicans, Escherichia coli and Totale Aerobic Count. These plates can also be used for PET testing, and the only thing missing to get PET-testing done in-house for me is the cultures of test-microorganisms. 

I have seen many different prices on PET-testing, generally around $1155, but I have also paid $90. 

I think doing these tests in-house also improves the safety of the facility and products, as you can test more frequently. 

[naturalformulator]

3 roll miller!

[naturalformulator]

How do you recommend using the silicia then? I normally grind the pigments with Caprylic/Capric Triglycerides. I would try to use Glyceryl Streate as an w/o emulsifier.