User`s manual

Settings and Adjustments
Printing Preferences
980541-003 Rev. A P630i, P640i Card Printer User’s Manual 63
Black Extraction
Black extraction has to do with the way the
printer driver handles the K (black) panel. It
applies only to surfaces of the card on which
both YMC (color) and K (black) are to be
printed.
Equal amounts of Y, M and C dyes, at
maximum intensity, deliver a near-black image,
but one that is not machine readable. A bar code
printed from YMC will be visible to the eye, but
will not be detectable by most bar code readers.
The remedy for this is to extract the black;
which means printing the same bar code, using
the K panel, on top of the YMC bar code. You
can also choose to print only in K, omitting
YMC from that region. The K panel is not a
dye. It is more of a paint containing carbon
black, which is highly visible to infrared-type
readers.
Printing Elements
Depending on the application used to create the card layout, elements of the design may be
identified in different ways to the printer driver. This printer driver recognizes, and rasterizes,
five types of elements: text, lines and pixels, area fills, monochrome bitmaps, and color bit
maps:
Text Text which is sent explicitly as such to the printer driver.
Lines and Pixels Lines and dots (pixels) sent as such to the printer driver.
Area Fills Color-filled geometric shapes.
Monochrome Bitmaps 1-bit bitmaps (every pixel either black or white).
Color Bitmaps Full color uncompressed pixel maps.
The above elements may not always be sent to the driver as expected. For example, a bar code
may be sent as text, a series of area fills, or a monochrome bitmap. Results will vary by
application used to create the card design. Another variable, again controlled by the card
layout application, is the precedence (stacking order) of the various element types in the event
that one or more of them overlap.