Hewlett-packard Development Company, L.p.

Rajasekar Vaidyanathan

Xulong Fu

Tienteh Chen

Jason Swei

Bor-Jiunn Niu

Lokendra Pal

Silke Courtenay

Xi Zeng

Christine E Steichen

Tony Pidding

Mark Drake

Bryan Darr

A pre-treatment coating composition includes evaporable liquid vehicle and a pre-treatment coating matrix, including from 30 wt % to 70 wt % multivalent organic salt, from 5 wt % to 30 wt % dispersed polyurethane binder having a weight average molecular weight from 30,000 Mw to 100,000 Mw, from 0.5 wt % to 8 wt % of a high molecular weight polyvinyl alcohol binder, and from 10 wt % to 30 wt % of a low molecular weight polyvinyl alcohol binder. The low molecular weight polyvinyl alcohol binder and the high molecular weight polyvinyl alcohol binder are present in the pre-treatment coating matrix at a 3:1 to 15:1 weight ratio, and weight percentages are based on dry weight of the pre-treatment coating matrix.

Pre-treatments for packaging print media

The present disclosure provides a print medium, a printed article, and a method of printing. The print medium can include a thin paper substrate having weight ranging from 40 GSM to 150 GSM, and a pre-treatment coating applied to the thin paper substrate at a weight ranging from 0.3 GSM to 15 GSM. The pre-treatment coating can include from 10 wt % to 80 wt % of a fixer, from 3 wt % to 50 wt % of a latex polymer, and from 5 wt % to 50 wt % of a water holding agent.

Print medium

A printable recording media containing a substrate; a pre-coat layer including more than about 60 wt % of one or more inorganic pigments by total dry weight of the pre-coat layer; a topcoating layer including more than about 60 wt % of one or more inorganic pigments; up to 25 wt % of binders and up to about 5 wt % of a combination of natural and synthetic rheology modifiers, by total weight of the top-coating layer, wherein the ratio of the amount of natural rheology modifiers to the amount of synthetic rheology modifiers is from about 90:10 to about 50:50. Also disclosed herein is a method for making such printable recording media.

Printable recording media

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San Diego, CA, United States of America

Rajasekar Vaidyanathan