cm6520 8-21Replacing toner cartridges and staples and emptying punch scrap box 8Replacing toner cartridges and staples and emptying punch scrap box Chapter 816 Insert the used imaging unit into the empty blackprotective bag and box of the new imaging unit.% Dispose of used imaging units properly. Recyclewhere possible.17 Adjust the gradation levels.– For details on adjusting the gradation levels, refer to "Gradation Adjustment" on page 11-59.7 CAUTIONPrecautions for toner spills% Be careful not to spill toner inside the machine or get toner on your clothes or hands.% If your hands become soiled with toner, immediately wash them with soap and water.% If toner gets in your eyes, immediately flush them with water, and then seek professional medicalattention.