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The Beginning
Libraries were some of the first industries to adopt barcoding. Primarily used in the public and academic sectors where the problems of fast turnover of items to impatient users loomed largest, bar-coding technologies were an ideal automatic identification technology for early system builders. Nowadays barcodes are cost-effective for small business to buy through resellers instead of going directly through GS1. This basic technology review is designed to summarise the key points about barcoding for those new to the technology.
Codes
More correctly, the code that carries the information in the barcode is termed a Symbology. Examples are Code39, Plessey, Telepen, Codabar. The grocery codes UPC and EAN are examples from another industry – although the ISBN coding on new book jackets is a form of EAN – extended to cope with the occurrence of the “X” character in the check position. Each symbology has disadvantages and advantages of readability, ease of printing and the range of information that can be encoded. Bar-code symbologies are less critical than they were since the improvements in the readers mean that a modern scanner can read all codes simultaneously and discriminate between them so that misreads are a rarity – but not an impossibility.
If you are choosing a symbology to use in a new library then choose from the standard few that are used in the industry.
Printing bar-codes can be achieved by a wide variety of PC packages on all the standard types of printer e.g. laser, ink jet and dot matrix. Special on demand labelers are also available. Larger libraries generally find that the trouble of printing their own codes is just not worth it since there are many commercial printing service providers available who will print codes of guaranteed readability. Smaller libraries can certainly print bar-codes successfully and many of the library management systems (LMS) provide an integrated barcode printing function as part of the acquisitions or cataloguing module. When printing codes yourself, consider:
size of labels and amount of data to be encoded – get some sample codes from the LMS or software package supplier and ensure that the book accession number fits the label. Make sure that there is sufficient white space at each end of the label beyond the code – this enables the reader/scanner to “synchronise” on the code.
the label adhesive – you want the labels and the item to become firm friends – not brief acquaintances! Labels come in varying grades of permanence – ask for “100% adhesive”.
When printing numbers in batches it is easy to reprint a sequence and find duplicate numbers affixed to items in circulation. Although your software will generally help sort things out by refusing duplicate accession numbers to be added, once duplicates in the system they can cause havoc.
Buying UPC Codes from a reseller can be cost-effective and highly efficient. If you have less than 100 products is wiser to go through a business like Quality UPC.
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