ChannelCheck™ Instrument Cleaning Verification Kit Checks for Blood, Protein, Carbohydrates (1143116_BX) 2/BXChannelcheck tests for three common organic soils at once: blood, protein and carbohydrates with improved sensitivity of the carbohydrate and protein pads The color and color change for the protein pad have changed to a white (negative) and to a blue purple (positive), which enhances the visual interpretation of results Capable of testing virtually any lumened instrument for residual organic soils, no matter the channel size There are 50 tests in a