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Check Digit: Using an algorithm with one or more data sets to compute a
digit, which is used to verify validity of the data set. Under ANSI/ISO specs, the
final digit of the individual account number.
Coercivity (Hc): The property of a magnetic material which resists demag-
netization, measured by the maximum value of its coercive force.
Core: (a) The central material layer, usually PVC, of a laminated magnetic
stripe card on which the graphics are printed before overlay lamination. (b)
The high-permeability low-coercivity ring running from the gap through the
coil of a read or encode head.
CR-80: Industry specification name for credit card sized cards.
Credit Card Size: An ID badge or card measuring 2.125” wide by 3.375”
long.
CMY: Cyan, Magenta, and Yellow are the primary (print) colors. The three
colors, CMY, are combinedin varying degrees, (15 bits for 32K colorsin Privi-
lege 300 and 400 color printers). Note that Privilege color printers image these
colors using YMCKO and YMCKOK ribbons, where colors and sublimation
black comes fromYMC combinations, a thermaltransfer black comes fromthe
K, and a protective transparent overlay comes from the O.
CMYK: Cyan, Magenta,Yellow, and Black are the print colors used by press
men when using the four-color process.
Data (IBM) Size: An ID badge or card measuring 2.328” wide by 3.250”
long.
Debit Card: (a) A card with value encoded on the magnetic stripe, which is
re-encoded with a lower value at each use. (b) A magnetic stripe card used
with a PIN number to authorize electronic debit of funds from an account,
more properly an EFT card.
Density: The number of bit cells encoded per unit length along the magnetic
stripe, usually expressed as bits-per-inch, or BPI.
Die Cutter: A punch & die device used to cut a photo or ID material to exact
size for insertion into a laminating pouch.
Dithering: A technique for imaging color or gray-scale shades that uses a dot
matrix. (e.g., a matrix with 2 dotsimaged will appear lighterthan a matrix with
16 dots imaged.) Thermal Transfer printers employ this technique.
DPI: Dots Per Inch; print density
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Glossary