When do you need to add a cosmetic preservative

[s3video s3url=”Preservative-vid1.mp4″ splash=”https://chemistscorner.com/wp-content/uploads/2015/07/Screen-Shot-2015-07-08-at-3.09.48-PM.png” /] Join the Cosmetic Preservative Webinar Webinar begins July 15, 2015! What is it? We’re hosting for a limited time a webinar…