Recording medium, process for production thereof, and ink-jet recording method employing the medium

A recording medium having a porous ink-receiving layer containing alumina hydrate of boehmite structure formed on a base material, wherein microcrystals of said alumina hydrate are directed to be parallel to a plane direction of said ink-receiving layer at a parallelization degree of not less than 1.5.

A recording medium having a porous ink-receiving layer containing alumina hydrate of boehmite structure formed on a base material, said alumina hydrate having crystallinity ranging from 15 to 80, and microcrystals of the alumina hydrate being directed to be parallel to a plane direction of said ink-receiving layer at a parallelization degree of not less than 1.5.

A process for producing a recording medium having a porous ink-receiving layer containing alumina hydrate of boehmite structure, comprising the steps of:

• applying a coating liquid containing alumina hydrate of boehmite structure with shearing stress onto a base material;
• and drying the coated material to obtain a degree of parallelization of a microcrystal of said alumina hydrate with a plane direction of said ink-receiving layer of not less than 1.5.

A process for producing a recording medium, comprising the steps of:

• applying a liquid dispersion containing alumina hydrate of boehmite structure having crystallinity ranging from 15 to 80 on a base material;
• and drying the coated material at a relative humidity of 20 to 60% to obtain crystallinity of said alumina hydrate ranging from 15 to 80 in the recording medium.

A process for producing a recording medium, comprising the steps of:

• applying a liquid dispersion containing alumina hydrate of boehmite structure having crystallinity of lower than 15 on a base material;
• and drying the coated material at a relative humidity of 10 to 20% to obtain crystallinity of said alumina hydrate ranging from 15 to 80 in said recording medium.

A process for producing a recording medium comprising the steps of:

• applying a liquid dispersion containing alumina hydrate of boehmite structure having crystallinity of lower than 15 on a base material;
• and heating the coated material at a relative humidity of 10 to 20% to obtain crystallinity of said alumina hydrate ranging from 15 to 80 in said recording medium.