Mitsubishi Paper Mills Limited

Hirokazu Ohkura

Haruhiko Ikeda

Masahiro Higuchi

Kenji Hyodo

Takashi Kikuchi

Hideaki Senoh

Koji Igarashi

Kouji Idei

Akinori Okada

Toru Katsura

Hiroo Kaji

Hideaki Senoo

Masaru Andoh

Susumo Ogawa

A tack sheet for ink jet recording, which comprises an ink jet recording sheet having at least one ink-receiving layer formed on one side of a support and an adhesive layer formed on the other side of the support, and a release sheet integrated thereto to cover the adhesive layer, wherein a cationic polymer is contained or impregnated in at least one of the support and the ink-receiving layer, and the ink jet recording sheet has an internal bond strength of from 120 to 320 g.multidot.cm/cm.sup.2 as measured in a wet state after being immersed in water at 20.degree. C. for 10 seconds, in accordance with TAPPI USEFUL METHODS NO. 403.

Tack sheet for ink jet recording

Disclosed is a coat type ink jet recording sheet which has on one side of a support a backcoat layer containing a specific platy inorganic pigment and on another side an ink-receiving layer containing at least one of starch particles, modified starch particles and ethylene-vinyl acetate copolymer resins, and a specific cationic dye fixing agent in such an amount as providing a specific cation charge per unit area of the recording sheet. This ink jet recording sheet is less in curling and cockling in wide ranges of temperature and humidity, improved in runnability on recording apparatuses, high in light resistance and ozone resistance of recorded images and in adhesion of the coating layers, less in blotting of overlapped color ink dots of the recorded images and besides, hardly undergoes yellowing.

Ink jet recording sheet

Heat sensitive recording paper having such a thickness distribution that the average amplitude of paper thickness variation, between 0.2-mm and 1.0-mm wavelengths of paper thickness variation, does not exceed 0.5 .mu.m and no distinctive variation peak is present in the above wavelength range.

Heat sensitive recording paper

There is disclosed a thermal recording paper comprising a support having a roughness index, measured by the method of liquid absorption test on paper and board (Bristow's method) in Japan TAPPI paper pulp test method No. 51-87, of not more than 8 ml/m.sup.2, a thermal recording layer, and an intermediate layer formed therebetween.

Thermal recording paper

A heat-sensitive recording material containing a special sensitizer in a heat-sensitive recording layer is excellent in thermal response properties and sensitivity.

Heat-sensitive recording material

A heat-sensitive recording material containing a special sensitizer in a heat-sensitive recording layer formed on a support is excellent in thermal response.

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Tokyo, Japan

Hirokazu Ohkura