Plasticisers Information Centre – How plasticisers work. An initiative of the European Council for Plasticisers and Intermediates (ECPI).

Plastics Technology Laboratories, Inc. – Learn more about the tests and equipment used to determine durometer.

PVC Awareness – Learn more about the invention and history of PVC.

YouSendIt.com – An excellent web site for emailing large files (up to 1GB) without overloading your recipient's mailbox.