📦 GS1 Barcodes and Product Setup for UK Honey Brands

About this simulation

Before a jar of honey can reach a shop shelf or a farm shop's EPOS till, it needs a GTIN (Global Trade Item Number) encoded in a scannable GS1 barcode. Each consumer-facing jar gets its own 13-digit GTIN (printed as an EAN-13 barcode); the outer trade case that holds several jars gets a separate 14-digit GTIN (GTIN-14, often printed as an ITF-14 barcode) so wholesalers and retailers can order, receive and bill in whole cases without confusing a case for a single jar.

How it works

• A UK company's GS1 prefix (numbers starting 50–509) plus a company and item reference form the first 12 digits of the GTIN.
• A check digit is calculated from those digits using the GS1 Modulo-10 algorithm — weights of 3 and 1 alternating from the rightmost digit — and appended to the barcode.
• For a trade case, an extra leading indicator digit (1–8) marks the packaging level, and the check digit is recalculated over all 13 preceding digits.
• At the till, the scanner recomputes the check digit from the data digits it just read. If it doesn't match the embedded check digit, the scan is rejected — this is exactly why a single mistyped digit on a barcode file can block a whole product from ever ringing up correctly.

Controls

• Packaging level — switch between the consumer unit (jar, GTIN-13/EAN-13) and the trade case (outer, GTIN-14/ITF-14).
• Case indicator digit — the 1–8 digit GS1 assigns to identify the packaging hierarchy level of a case.
• Units per case — how many jars are packed in the case, shown in the box's inner grid.
• Barcode data — toggle between a mathematically valid check digit and a corrupted one, to see a real EPOS rejection.
• Belt speed — how fast items move toward the scanner.

Did you know?

GS1 UK issues the company prefixes behind every UK barcode. Retailers' product-data portals validate the GTIN, check digit, pack hierarchy and label artwork before a new line is ever allowed onto their EPOS system — which is why getting GS1 setup right the first time saves small honey brands weeks of back-and-forth before launch.