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Code 128 can be
defined as a linear, very high
density and alphanumeric barcode
symbology competent to encode text,
numbers, number functions and ASCII
character set. Code 128 was
developed in 1981 by Computer
Identics.
Code 128 barcode
symbology is also recognized as
GS1-128, UCC-128, EAN-128 and
others.
Character
set of Code 128 symbology
Code 128 barcode
fonts support three different sets
of characters
-
Set A
– It includes capital letters,
numeric values, control codes,
punctuation.
-
Set B
– Comprises of uppercase
alphabets, numeric values,
lowercase letters and
punctuation.
-
Set C
– Contains double density
numeric values ranging from 00
to 99.
Structure
of Code 128 symbology
A Code 128 barcode
structure consists of the following
elements:
- A start
character
- Encoded
Message
- Check
character
- Stop
Character
-
Termination bar (bar+space+bar)
Code
128 barcode symbology uses four
different widths. Each character of
Code 128 is represented by six
elements (3 bars and 3 spaces).
Applications of Code 128 barcode
symbology
- Used in
industries.
- Code 128
symbology is compulsory for
printing barcode labels of
Confirmation Services.
- USS Code128
also implements subset C to
print barcode.
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