Which Cosmetic Preservative?

Here's some great links to learn about the action of different types of preservatives in cosmetics:

http://www.makingskincare.com/preservatives/
https://www.facebook.com/groups/makingskincare/permalink/529462787179550/
http://www.newdirections.com.au/content.php?p=home-preservative-efficacy-testing-1

USEFUL LEARNING SITES FOR MAKING CREAMS/LOTIONS/BALMS:
http://swiftcraftymonkey.blogspot.com.au/
https://www.facebook.com/groups/makingskincare/permalink/408629572596206/
http://www.makingskincare.com/
http://tisserandinstitute.org/effective-use-alcohol-aromatic-blending/?

LEGAL REQUIREMENT OF MAKING AND SELLING SOAP AND COSMETICS IN AUSTRALIA 
Please note that if you intend to sell soap or cosmetic products to the public in Australia, there are legal requirements to follow which are part of the Australian legal framework of the Department of Health's NICNAS (NATIONAL INDUSTRIAL CHEMICALS NOTIFICATION AND ASSESSMENT) SCHEME. The NICNAS policies for the production and sale of soap and cosmetics can be found here.