We use 30" rolls in manufacturing our product, similar to this:
We barcode the box the the roll comes in, but once we pull it out of the box we use masking tape to keep the barcode label attached to the roll. We've experimented putting the barcode on the inner roll but found we couldn't scan it. Now I'm looking into tube plugs like this:
but I haven't found something that I believe really does the job of holding a barcode to the roll.
What do others use to manage barcodes for roll inventory?