Pre-treatment composition for inkjet printing

摘要

A coating composition for pre-treating a substrate prior to inkjet printing thereon, and an inkjet receiving medium including a substrate and having a topmost layer coated thereon, where the coating composition has a solids content which includes at least 30 wt % of one or more aqueous soluble salts of multivalent metal cations, and particles had primarily of polymer having a Rockwell Hardness of less than R90 and having a mode equivalent spherical diameter of at least about 2 micrometers. When coated, the composition provides at least 0.01 g/m2 of particles included primarily of polymer having a Rockwell Hardness of less than R90 and which have an equivalent spherical diameter of i) at least about 2 micrometers and ii) at least 0.1 micrometer greater than the minimum coated thickness of the topmost layer.

主权项

1. An inkjet receiving medium comprising a substrate and having a topmost layer coated thereon, wherein the topmost layer comprises one or more aqueous soluble salts of multivalent metal cations and particles comprised primarily of polymer having a Rockwell Hardness of less than R90, where the topmost layer is coated at a dry solids coat weight of from 0.1 to 5 g/m2 and comprises at least 30 wt % of the one or more aqueous soluble salts of multivalent metal cations, and provides at least 0.01 g/m2 of particles comprised primarily of polymer having a Rockwell Hardness of less than R90 and which have an equivalent spherical diameter of i) at least about 2 micrometers and ii) at least 0.1 micrometer greater than the minimum coated thickness of the topmost layer.