30mil, 10mil, 40mil etc. – This refers to the thickness of the cards. A “mil” is a unit of length equal to 0.001 (thousandth) of an inch. While not a common measurement term outside of the USA, it’s the more common card thickness measurement for ID cards around the world.
30mil cards are the most common and the type that most of your wallet is filled with! While all printers will be able to print on cards outside this range, it’s best to check your ID printer settings first just in case. Some printers may struggle to grip 10mil thin cards, and some may not be able to pass thicker 50mil cards through the card path.
Please contact us if you’re unsure what your printer can handle, we’re always available to lend a hand if you need to double check before ordering.