For example, if you find ink on one particular non-etched area of the plate, place the Allen wrench or screw driver into the screw head just above that area. Then cycle the blade again and check the results. If the excess ink is removed, give thanks and don't touch anything else. If the excess ink is only slightly removed, turn the screw a fraction more and repeat this process until the excess ink is removed by the blade. Note that if you are heavy handed, you will run the risk of distorting the blade badly, and the problem will move somewhere else on the plate.
Excess pressure can damage both the plate and the doctor blade.
If none of these adjustments results in a cleared plate, start fine tuning in the middle of the blade, turning the center screw very slightly clockwise. Work out from the center, alternating from side to side, turning each screw in small increments and testing the doctoring function between each adjustment. Eventually, the ink should clear from the plate. If everything starts to go wrong and ink begins randomly clearing or remaining on the plate surface, return all screws to their original position and start over. Subscribe online to Screen Printing, the only magazine covering the entire field of screen printing.