169
Do not attempt to print on any of the following types of envelopes. These may cause
damage to your printer.
B
Envelopes with clasps, snaps or tie strings (see Figure 1)
B
Envelopes with transparent windows (see Figure 2)
B
Envelopes that will melt, discolor, scorch offset or release hazardous emissions
when exposed to 200
°
C (392
°
F) for 0.1 second
B
Envelopes that use encapsulated types of adhesive that do not require moistening
but rely on pressure to seal them
Figure 1
Figure 2
Always test a sample of the envelopes you are thinking of buying. Confirm that the
envelope performs acceptably.
For best printing results
B
Avoid printing in high humidity i.e., above 70%.
High humidity may cause the envelope to curl and pick up excess toner.
High humidity may also cause the envelope to seal.
B
Avoid printing below 10
°
C (50
°
F) with less than 30% relative humidity.
Low temperature with low humidity may cause light printing.
Envelope storage is very important. Store them away from moisture and humid air,
where they can lay flat and their edges won’t be bent or damaged. The humidity
should not exceed 70% RH.
Appendix
