There are a number of specialized tolerances associated with paper used in the LaserWriters. Although no specific tests have been done on recycled paper, the following specifications must be met for the paper, recycled or not, for paper to work properly:
Poundage tolerances = 16-35 lbs. with Manual Feed; 16-24 lbs. with Paper Tray.
Coating and grain are not specified individually, but the final smoothness, which includes the long-grain requirement and any coating, should fall into the range of 100-300 Sheffields.
The end result should be a paper, including any coating, that does not scorch or melt at 200 degrees C for 1/10 of a second.