As for the hydrophilic silica applicable to the invention, it is preferable to use silica prepared by {HEAD ~ a high temperature hydrolysis} of {TAIL ~ silicon chloride compounds} in vapor phase, because it is high in purity, excellent in dispersibility to a coated layer, large in surface area and excellent in adsorbing function of water molecules 
of
As for the hydrophilic silica applicable to the invention , it is preferable to use silica prepared by { HEAD ~ a high temperature hydrolysis } of { TAIL ~ silicon chloride compounds } in vapor phase , because it is high in purity , excellent in dispersibility to a coated layer , large in surface area and excellent in adsorbing function of water molecules
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