Canon Arizona 135 GT Operation Manual page 83

How to Handle Media
Thermal Deformation of Media
Some heat-sensitive media may deform when subjected to high heat. If this occurs you can
reduce the lamp power from the default setting of 70%. You can also try to print uni-directional
using only the trailing lamp (to do this set the power of the leading lamp to 0).
Chapter 4 - Operate the Printer 83