Epson DLQ-3500 User Manual page 160

When using labels whose backing sheet is entirely covered,
make sure the cuts around the edges of the labels are
perforated.
1. backing sheet
2. label sheet
3. several uncut areas on each side
4. label
When using labels whose backing sheet is not covered with
the label material, see the illustration below and do not set the
paper-thickness lever to the AUTO position, set it manually.
1. label
2. backing sheet
3. corner radius is more than 2.5 mm
4. label
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