MAC production codes are a handy way of working out how old your more perishable cosmetics are, as well as being useful for working out the 'safe' qualities of various pigments (certain pigments made after a particular date are listed as being safe for eyes, lips and face, whereas previous production lots of these same pigments may have been unsuitable for eyes or lips) and being a good indicator of whether a product is fake or not.
Product codes
	Product Code Breakdown
	The first letter signifies the production run that month - A was the first run, B the second run and so forth. The second letter or number signifies the month of production: 1 = January 2 = February 3 = March 4 = April 5 = May 6 = June 7 = July 8 = August 9 = September A = October B = November C = December The final number indicates the year of production. Using these numbers tells me that this Bombshell lipstick was made in the first production run of April, 2005.
LEGAL: This guide is informational only, I take no responsibility for any results or damage acquired as a result of following this tutorial. Product names and MAC logo remain the copyright of MAC (Make-Up Art Cosmetics), and no infringement is intended. I am not affiliated with MAC in any way. For further information or product details, please visit maccosmetics.com Design by Lara Hill, larahill.com