Epson TM-C3500 Series Technical Reference Manual page 37

Die-cut label (BM)
Edge R
Edge cutoff
Center of black marks
Center of paper width
Perforation position
2 mm or more 
( W h e n u s i n g fa n -
fold paper)
Media type
Media source
Backing paper width
When removing all the fringes
Paper width
Label width
<Back side>
Black mark width
Plain label / Matte label / Glossy label
Roll paper
30 to 112 mm {1.18 to 4.41"}
Chapter 1 Product Overview
Backing paper
Label area
Edge cutoff
<Printing side>
Center of paper
width
1
Paper feeding
direction
Backing paper
Label area
37