Industry 2 of 5 barcodes have been in use since the late 1960’s for airline tickets, photo developing envelopes, and warehouse sorting systems. The Industry 2 of 5 barcode is also called Code 2 of 5.

Industry 2 of 5 encodes all of the information in the bars. The spaces are fixed width and are used only to separate the bars. Consequently, it is a fairly inefficient code in terms of how much space is required to encode a single digit.

• Since Industry 2 of 5 is a numeric-only code, Barcode Xpress generates an error if the barcode value contains characters that are not numeric. Industry 2 of 5 requires a quiet zone, which should be at least the width of 10 narrow bars. This means that if you set the MakeBarcodeBarSize property to 3 pixels (narrow bar size), you should set the MakeBarcodeBWidth property to 30 pixels.
• Since Industry 2 of 5 is a self-checking barcode, it normally does not require a checksum. However, when necessary, an optional modulo 10 checksum may be used. By default, Barcode Xpress will not write optional checksums. If a checksum is desired for Industry 2 of 5, set the BarcodeAppendCheckSum property to True and Barcode Xpress will calculate and write the checksum.