Xerox P8EX DocuColor 8000/7000 System Adminstration Guide - Page 60

1. To o ls M od e Decurler Setup and Decurler E Table Settings When paper is exposed to heat, the paper loses moisture and curls toward the heat source. High toner coverage jobs tend to curl more due to the toner plastification effect on the paper surface. The system tries to reduce this by using mechanical devices within the paper path called decurlers. Your system has been designed with an automatic curl control system that uses information such as: the amount of coverage on the page, paper weight, whether the paper is coated or uncoated, and the current humidity and temperature to determine the amount of pressure needed at the different decurlers to reduce output curl. With some print jobs, the output prints still may be curled more than you desire. In cases like these, use the Decurler Setup and Decurler E Table Settings features to compensate for paper curl in your prints. Paper curl is caused by many variables, including: • The manufacturer's brand of paper and the manufacturing lot • The weight of the paper and whether it is coated or uncoated • The amount of dry ink/toner and the area being covered on a sheet; the heavier the coverage, the greater the tendency to curl • The atmospheric conditions of the room where the paper is stored • The atmospheric conditions of the room where the digital press is located • The heat generated during the fusing processes 1-36 DocuColor 8000/7000 System Administration Guide