Allocating barcode numbers
When using the indicator (logistical variant) method of forming an GTIN-14 identification number, an indicator (logistical variant - a number between 1 and 8) should precede the first twelve digits of the GTIN-13 identification number of the items contained within the non-retail unit.
The last digit is the Check Digit, which must be recalculated.
Calculate your Check Digit/s.
This method can be used to distinguish between different levels of packaging e.g. a carton of 24 cans of baked beans can have an indicator of 1, a carton of 36 cans of baked beans can have an indicator of 2 etc.
GTIN-14 identification numbers can be encoded in an ITF-14 or GS1-128 barcode. The ITF-14 barcode is better suited for direct printing onto corrugated fibreboard.