| 摘要 |
A production method of a porous medium comprising a non-water-absorptive support and a porous layer provided on the support is disclosed. The method includes steps of, applying Water-based Composition A comprising inorganic microparticles of an average primary particle diameter of less than or equal to 30 nm, a hydrophilic binder and water onto the support to form a coated layer, drying the coated layer to form the porous layer, and applying Water-based Composition B onto the porous layer, and the Water-based Composition A further comprises a compound represented by Formula.
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