PostBar and Royal Mail (KIX)
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PostBar and Royal Mail (KIX)
PostBar and Royal Mail bar codes, like POSTNET, are used for mailing
applications. However, these bar codes can encode full addresse s on labels.
These bar codes are similar to POSTNET in terms of bar space and width, but
have four different types of bars (Full Height, Ascender, Descender, and
Tracker), whereas POSTNET only has two bar types (Tall and Short).
The Royal Mail symbology converts alphanumeric characters in to patterns of
four bars, using combinations of Full Height, Ascender, Descender, and
Trackers. It also adds start and stop bar codes as well as a check digit, except
with the KIX format (see below).
PostBar allows you complete flexibility to specify the indivi dual bar types that
comprise the signal. For PostBar, you are responsible for encodi ng the
address, adding the start and stop codes, and supplying the appropr iate
check digit.
Quiet Zone
The bar code structure requires a completely blank quiet zone which is a 2mm
border on each side of the bar code.
Start/Stop Code
The start and stop bars identify the orientation of the bar code.
Data Field
For PostBar, a variable length data field of digits “0” through “3” are allowe d to
represent the bars: Full Height (0), Ascender (1), Descender (2), and Tracker
(3). For Royal Mail, the data is restricted to alphanumeric characters “A”
through “Z” and “0” through “9”. If using the KIX format for Royal Mail,
lowercase characters “a” through “z” are also valid.
Each bar

width

is equal, and must be .020-inch ± .005-inch. Horizontal
spacing between bars (pitch) must be 22 bars ± 2 bars per inch over any
0.50-inch portion of the bar code. The height of the bars (Full Height) has a
maximum of 0.230 inches and a minimum of 0.165 inches.
Check Digit
For PostBar, you are responsible for encoding and check digit. For Royal
Mail, a modulo-6 check digit is inserted at the end of the data field.

KIX Format

The KIX format for Royal Mail does not include the start/stop code or the
check digit.