ITF-14 is an Interleaved 2-of-5 symbol used to mark outer packaging in GS1 supply chains. Each pair of digits is encoded together: one digit in the bars, the adjacent digit in the spaces between them.
Input format
13 or 14 numeric digits only. Entered as 13 digits, the encoder appends the GS1 Modulo-10 check digit. The full 14-digit value typically encodes a GTIN-14: a packaging indicator digit followed by a 13-digit EAN/GTIN product code.
Printing on corrugated
ITF-14 is designed for printing on rough surfaces such as corrugated cardboard. The standard output includes bearer bars — thick rules above and below the bars — that keep platen pressure even during contact printing and reduce ink spread errors.