Published September 16th, 2003 by Jim O'Halloran
Weighed Item Barcodes
I’ve been trying to find out how those barcodes that they stick on weighed stuff in the supermarkets work. You know the ones where you buy 500g of sliced ham, so they grab the ham, weigh it and wrap it up for you, then the scales print out a label that has both the weight, and a product code encoded into a barcode.
This offers one possibility. I don’t know whether or not this is the barcode format that the weigh scales produce though.
The EAN standard reserves prefixes 20-29 for barcodes produced in store, so its probably pretty close. Will have to raid the freezer tonight and see.