2 of 5 bar code symbologies have a numeric character set and unique start and stop patterns.
Interleaved 2 of 5
The Interleaved 2 of 5 bar code (also called I 2/5 or ITF bar code) is used primarily in the distribution and warehouse industry.
The symbol has two characters paired together using bars to represent the first character and spaces to represent the second. Each character has two wide and three narrow elements.
To prevent misreads and to provide a more secure symbol, a check digit can be included. In addition, to prevent short reads you may include bearer bars at the top and bottom of the bar code, or around the entire bar code. When bearer bars are included, they must touch the top and bottom of all the bar code's elements, and they must be at least three times the width of the narrowest bar.
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Specifications |
Description |
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Character set: |
Numbers only (0-9) |
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Length: |
Even number of digits |
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Height |
At least .15 inches x length or .25 inches, whichever is larger |
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Data character density: |
11.11 characters per inch Based on X=.01 inches (.25 millimeters), 3:1 |
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Check Digit: |
Including one is optional. You can use a USS Modulo 10 or OPCC Modulo 10 check digit. |
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Quiet zone: |
At least 10 times the narrowest bar width, or at least .25 inches |
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Composition: |
Quiet zone | start character, encoded as 1010 | data | stop character, encoded as 1101 | quiet zone |
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Options: |
Bearer bars |
Industrial 2 of 5
The Industrial 2 of 5 bar code (also called Standard 2 of 5 bar code) is used primarily for airline tickets, photo finishing and warehousing.
It is a low-density bar code symbology with a numeric character set and unique start and stop patterns. Unlike Interleaved 2 of 5, Industrial 2 of 5 may have an odd number of digits. Each character comprises two wide bars and three narrow bars. Industrial 2 of 5 has a space called an inter-character gap between each character. The size of the inter-character gap is generally the size of one narrow element.
A variant of the standard Industrial 2 of 5 bar code is an Industrial 2 of 5 bar code with two-bar start and stop characters. The two-bar start and stop characters are the same start and stop characters that are used for Interleaved 2 of 5.
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Specifications |
Description |
|---|---|
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Character set: |
Numbers only (0-9) |
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Length: |
Variable |
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Height |
At least .15 inches x length or .25 inches, whichever is larger |
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Data character density: |
6.25 characters per inch Based on X=.01 inches (.25 millimeters), 3:1 |
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Check digit: |
Optional Modulo 10 |
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Quiet zone: |
Equivalent to 1.38 data digits for standard Industrial 2 of 5 bar codes Equivalent to 1.08 data digits for two-bar start/stop Industrial 2 of 5 bar codes. |
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Composition: |
Start character | data | optional check digit | stop character |
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Options: |
Bearer bars |
Deutsche Frachtpost
The Deutsche Frachtpost symbology is used by the German Postal Service to track mail. It contains a number that identifies the customer (sender) and the mail piece. The length can be 11 or 13 digits. The bar code has the following structure: 2 digits for primary distribution center ID, 3 digits for Customer ID, and 6 digits for Mailing number.