GS1 128 Barcode Introduction

GS1 128 (UCC/EAN-128) is a continuous, self-checking and bi-directionally decodable linear bar code symbology which was developed to provide a worldwide format and standard for exchanging common data between companies by encoding data and encoding what that data represents. It identifies data with Application Identifiers (AI). GS1 128 is widely used in trade item data for logistics units such as cartons, cases, pallets, and returnable assets.

Encodable Chars	add () around the AI code, and followed by the AI data. GS1 128 encodes data using the Code 128 symbology:
Check digit	The checksum digit is based on a modulo 103 calculation
Components	Three identical character set as Code 128, as defined by the International ISO/IEC 646 Standard Four non-data function characters Four code set selection characters (single character code set included) Three start characters (Start A, B, C) One stop character (13 modules: 1100011101011)

 

Quiet Zone	Start Character	Data Digits ""	Check Digit	Stop Character	Quiet Zone
1	2	3	4	5	6

To set the size of GS1 128, two things are of importance, i.e. the X Dimension and the barcode width.
Click here for more information on GS1 128 size setting.