Asahi Glass Company, Limited

Ashai Glass Company, Limited

Isamu Takeshita

Tomoki Gunjima

Takuya Nakao

Manabu Suhara

Kohji Suzuki

Nobuyuki Yokota

A fabric for ink jet recording, which has a boehmite porous layer on the fiber surface of the fabric and is softening-treated.

Fabric for ink jet recording

A recording medium comprising a substrate and a porous layer formed on the substrate, said porous layer comprising alumina hydrate particles and nonionic or cationic water-insoluble resin particles having an average particle size of from 0.005 to 0.1 .mu.m.

Recording medium and method for its production

An ink jet recording medium comprising a substrate made of a fiber material coated with porous particles having a particle size of from 0.1 to 30 .mu.m, and a surface layer made of boehmite as the main component, formed on the substrate.

Ink jet recording medium and record

In the electrolysis of sodium chloride by means of a perfluoro cation exchange membrane for the production of sodium hydroxide having a concentration of from 32 to 40% by weight, a method for restoring the current efficiency, which comprises suspending the electrolysis when the current efficiency of the perfluoro cation exchange membrane has dropped to a predetermined level, and maintaining the catholyte concentration at a level of not higher than 30% by weight.

Method for restoring the current efficiency

A method of bonding a cation exchange membrane which comprises melt-bonding a part of the cation exchange membrane of a fluorinated copolymer in the form having ion-exchange groups of --COOY wherein Y represents hydrogen atom or a C.sub.1 -C.sub.20 alkyl group, when the cation exchange membrane is used in the form having ion-exchange groups of

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Yokohama, Japan

Isamu Takeshita