Appendix Paper Detection System • When using die-cut label paper without black marks, use paper with a light transmittance of at least 40% for the backing paper and 23% or less for the label portion. • When using black marks to detect paper, use paper with black marks reflectance of 10% or less and a white reflectance of 70% or more. • When preprinting on the reverse side of continuous paper, do not preprint in the area shown in the figure because it will affect the paper detection performance.
Paper Do not preprint here Paper feed direction 13 mm {0.51 in.} 13 mm {0.51 in.} Front side Reverse side 5.9 mm {0.23 in.} 5.9 mm {0.23 in.} 390 Detector Label detector (transmissive photo interrupter) Black mark detector (reflective photo interrupter) Detection method Paper is detected by the label detector and the black mark detector.