Bumpy Bar Code (BBC) is any linear bar code symbology that has been marked on material to be read without the use of contrast. Typically bar codes are read by readers that detect the difference between the bars and the background by the amount of visual contrast (or black and white difference) between them. Bumpy Bar Codes are those marks that are created to utilize their relief or "bumpy" aspect to determine where the bars and spaces reside within the code. This technology allows a mark with zero-contrast (white bars and white spaces or black bars and black spaces) to be read without paint, ink or special lighting.

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