Kyocera KM-2540 Advanced Operation Manual page 117

Appendix
Label
Be sure to feed labels from the MP tray.
For selecting labels, use extreme care so that the adhesive may not
come in direct contact with any part of the machine and that the labels
are not easily peeled from the carrier sheet. Adhesives that stick to the
drum or rollers and peeled labels remaining in the machine may cause a
failure.
When printing onto labels, you must be liable for the print quality and
possible trouble.
Labels consist of three layers as shown in the illustration. The adhesive
layer contains materials that are easily affected by the force applied in
the machine. The carrier sheet bears the top sheet until the label is used.
Top sheet
This composition of labels may cause more problems.
The label surface must be covered completely with the top sheet. Gaps
Adhesive layer
between labels may cause peeling of labels, resulting in a serious
Carrier sheet
failure.
Some label paper has large margins on the top sheet. When using such
paper, do not peel these margins from the carrier sheet before
completing output.
Allowed
Use label paper that conforms to the following specifications.
Item
Top sheet weight
Basis weight
(overall paper weight)
Top sheet thickness
Overall paper thickness
Moisture content
Not allowed
Top sheet
Carrier sheet
Specifications
44 to 74 g/m²
104 to 151 g/m²
0.086 to 0.107 mm
0.115 to 0.145 mm
4 to 6 % (composite)
6-7