Barcode Types - Interleaved 2 of 5

(sample)

As the name suggests, between every black bar (expressing former character), white bars (expressing latter character) are inserted. Then the combination express 2-digit number with five black bars and five white bars.

[13]

It appears as if five bars express 2-digit code, and therefore has higher density than other 2 of 5 bar codes.

Summary of Interleaved 2 of 5 Symbol

Character Set	Numeric
Code type	Continuous
Length of symbol	variable, but must be even length (fixed to 6/14/16 digits in case of UPC Case Code, Standard Symbology for Physical Distribution)
Self Check	Yes
Checkdigit	optional (uses modulus 10 in case of UPC Case Code, Standard Symbology for Physical Distribution)
Character Density	about 7.1 chars/cm (about 5 to 1 chars/cm in case of Standard Symbology for Physical Distribution)