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Arrow Magnetic Developer provides a visual examination of your magnetic encoding to help with alignment problems and the performance of quality control inspection of applications requiring a magnetic stripe like CR-80 cards. Arrow Magnetic Developer utilizes magnetic particles in a clear liquid to attract magnetically charged areas of the mag stripe, when the liquid evaporates the visual illustration remains. Available in dropper, squeeze bottle, and aerosol spray formats in as little as 2oz and up to 1 gallon containers to meet your requirements. See a quick video on how Magnetic Developer works.