Canon RP10 for CR-120/150 RP10 User Guide - Page 27

Appendix About Preprinted Paper When preprinting paper with the mark for position detection or a logo, note the following precautions. About Mark For Position Detection Print the mark for position detection on the heat-sensitive side of paper, as shown in the illustration below. The mark size should be 5 ± 0.5 mm in height × 10 mm in width or greater. Mark detection area Leading edge Mark Heat-sensitive side 5 ± 0.5 mm 10 mm or greater The mark should be black, with reflection density of 7% or smaller and a PCS value of 0.9 or greater. When printing the mark, use oil ink. Make sure that the mark has uniform ink density. Also, it is recommended that you overprint the mark to have a higher PCS value. About Mark Detection Area Do not print anything other than the mark for position detection in the mark detection area (10 mm in width starting from the right edge of paper). If you have no other choice, however, select the type of ink so that reflection density is 80% or greater in the operating wavelength range of a photointerrupter (700 to 1000 nm). Cautions About Preprinted Paper Thermal paper has different characteristics than general printing paper or carbonless copy paper. When printing on thermal paper, note the following precautions. Printing Method Ink will dry slower on thermal paper. Use the UV printing method. About Ink • Select the type of ink that has no adverse effects on the thermal printer, such as ink residues that adhere to the printer, thermal printhead wear and sticking. • Select the type of ink that contains 50 ppm or smaller Na and K ions respectively, and 100 ppm CI ions. Recommended ink: T&K TOKA RNC type • The surface intensity of the thermal layer is weaker than that of general printing paper. Take extra care about ink's Total Area Coverage (TAC). Make sure that ink's TAC values are approximately 6.0 for general thermal paper and are comparable to those of carbonless copy paper for long term storage thermal paper. However, ink will dry slower if the TAC values are lowered by a reducer. Keep the amount of adding a reducer to 5% or smaller. • Do not use too much ink. Doing so may result in poor coloring performance or sticking when printing from the printer. • Use ink materials that are heat resistant and have no heat reducing effects. Also, use similar ink for the non heat-sensitive side. • After printing, check that ink has adhered firmly to paper. Additionally, UV ink is generally susceptible to emulsification. Take extra care when managing dampening solution. • Make sure that ink does not show through on the back side of paper and there is no ink blocking. • Make sure that ink will not come off due to water, alcohol, etc. About Dampening Solution Thermal paper tends to repel water. Take extra care when managing dampening solution. Isopropyl alcohol (IPA) contained in dampening solution is likely to trigger color fogging if it is too much. Keep it to 5% or smaller for general thermal paper, and 10% or smaller for long term storage thermal paper. 27