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B.3. Special Paper
B-5
Overhead Projection (OHP) Film
OHP film must be able to withstand the heat of fusing during the printing process. It should satisfy the con-
ditions in Table B.3.
To avoid trouble, OHP film must be delivered face-up.
If OHP film jams frequently, pull the top of the sheet very gently as it leaves the printer.
Adhesive-Backed Labels
The basic rule for printing on adhesive labels is that the adhesive must never come into contact with any
part of the printer. Adhesive paper sticking to the drum or rollers will damage the printer.
Label paper must be manually fed.
Label paper has a structure comprising three lay-
ers, as shown in Figure B.1. The top sheet is
printed on. The adhesive layer consists of pres-
sure-sensitive adhesives. The carrier sheet (also
called the linear or backing sheet) holds the labels
until use. Due to the complexity of its composi-
tion, adhesive-backed label paper is particularly
likely to give trouble in printing.
Adhesive label paper must be entirely covered by
its top sheet, with no spaces between the individ-
ual labels. Labels with spaces in between are apt
to peel off, causing serious 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.
Table B.4 lists the specifications for adhesive
label paper.
Table B.3 OHP Film Specifications
Item Specification
Tolerance of heat Must tolerate at least 190°C (374°F)
Thickness 0.100 to 0.110 mm (3.9 to 4.3 mils)
Dimensional accuracy ±0.7 mm (±0.0276 in)
Squareness of corners 90° ±0.2°
Table B.4 Adhesive Label Specifications
Item Specification
Weight of top sheet 44 to 74 g/m² (12 to 20 lbs/ream)
Composite weight 104 to 151 g/m² (28 to 40 lbs/ream)
Thickness of top sheet 0.086 to 0.107 mm (3.9 to 4.2 mils)
Composite thickness 0.115 to 0.145 mm (4.5 to 5.7 mils)
Moisture content 4% to 6% (composite)
Top sheet (white bond paper)
Adhesive
Carrier sheet
Figure B.1 Adhesive-back label
Top sheet
Figure B.2 Label arrangement
UnacceptableAcceptable
Carrier sheet