Sigma DS4 and DS4-ES1 Installation and Administrator’s Guide 53
New Cards for Color Printing
The printer is designed to print on new card stock. If you print on cards twice, be careful to avoid
getting dirt, fingerprints, or other contaminants on cards before the second printing. Previous
printing can interfere with printing and result in cards that do not have the appearance you want.
Printing on cards that previously have been issued might introduce substances that interfere with
card printing or damage the printer. If a previously printed card has been printed with topcoat,
the card cannot be printed a second time.
Adhesive-Backed Cards
Adhesive-backed cards are printed, and then adhered to contactless smart cards when the card
surface is not flat enough to print. Use only approved adhesive-backed cards with the printer. The
printing surface (white side) of an adhesive-backed card meets the material requirements for use
in the printer. Use the following guidelines:
Store cards in a cool place (such as a refrigerator) to avoid adhesive migration.
Clean the printer’s card tracks to remove any adhesive residue. Use a printhead cleaning
swab to remove the residue.
Fan cards before loading them into the input hopper.
Use a print margin of at least 0.05 inch when using adhesive-backed cards.