Epson TM-L90 Technical Reference - Page 160

Black mark position II The black mark positions on the paper to be manufactured must meet the requirements in the figure below (the reflective rate is measured using the back of the paper, the non-printing side): ❏ Black mark length in vertical: 4 ~ 5.5 mm {0.157~ 0.217"} ❏ Black mark position: Any places Reflecting rate of black mark portion (1) 17% 16% 15% 14% 13% Less Reflecting rate of the portion where the 90% 85% 80% 75% 70% More black mark does not exist (2) NOTE: Reflective rates are measured by the Macbeth PCM-II (Filter D) meter. If label paper meets Black Mark Position Requirement I, it is not necessary to consider Black Mark Position Requirement II.  4 - 5.5 *5  0.5 *15 or more   (The dotted lines indicate the position of the label.) Paper feeding direction Preprintable area Back (non-printing side) [Units: mm] NOTE: Dimensions marked with * must be kept. 160 Appendix