Epson C3500 Technical Reference Guide - Page 210

Die-cut label (Blackmark) Paper width Paper width Label part Gap between Label length labels Label length Edge R Edge R Gap between labels Edge cutoff width Edge cutoff Label width Edge cutoff Edge cutoff Label width Backing paper Label area Edge cutoff Black mark length Center of black marks Center of paper width Center of paper width Paper feeding direction Interval of black marks Perforation position 2 mm or more  (When using fanfold paper) Black mark width Backing paper Label area 210