Barcodes are readily used for stock control and indentification within the supply chain or at the point of sale. Arinsdale Ltd is a member of GSI UK www.gs1uk.org. This membership provides us with a unique identifier to be able to produce EAN-8 and EAN13 and EAN-128 bar codes. Thermal transfer printers are used to accurately transfer this information onto product and packaging labels. Barcodes are verified on handheld readers to ensure accuracy.