Kyocera Ecosys P4040dn Operation Manual page 296

Labels
Labels must be fed from the MP tray.
The basic rule for printing on adhesive labels is that the adhesive must never come into contact with any part of the machine.
Adhesive paper sticking to the drum or rollers will damage the machine.
Label paper has a structure comprising of three layers, as shown in the
diagram. The top sheet is printed on. The adhesive layer consists of
pressure-sensitive adhesives. The carrier sheet (also called the linear or
Top sheet (white
backing sheet) holds the labels until used. Due to the complexity of its
bond paper)
composition, adhesive-backed label paper is particularly likely to give
Adhesive
printing problems.
Carrier sheet
Adhesive label paper must be entirely covered by its top sheet, with no
spaces between the individual labels. Labels with spaces in between are
liable to peel off, causing serious paper jam problems.
Some label paper is manufactured with an extra margin of top sheet
around the edge. Do not remove the extra top sheet from the carrier sheet
until after printing is finished.
The table below lists the specifications for adhesive label paper.
Item
Weight of top sheet
Basis weight
Thickness of top sheet
Composite thickness
Moisture content
Acceptable
Top sheet
Carrier sheet
A-22
Unacceptable
Specification
44 to 74 g/m² (12 to 20 lb/ream)
104 to 151 g/m² (28 to 40 lb/ream)
0.086 to 0.107 mm (3.9 to 4.2 mils)
0.115 to 0.145 mm (4.5 to 5.7 mils)
4 to 6 % (composite)
Appendix