| abstract |
(57) [Summary] The present invention has high ink absorbency, water resistance, Provided are an ink absorbent and a recording sheet having excellent light fastness. SOLUTION: An ink absorbent containing mesoporous silica and a recording sheet containing the above ink absorbent. The above mesoporous silica has a single molecule adsorption amount of water at 25 ° C. of 1.7 / being not less than 2 nm, having an average pore diameter of 5 to 10 nm, containing one or more of alkaline earth metal atoms and zinc atoms, and having been surface-treated with a silane coupling agent. Preferably, one or more are implemented. Further, it is preferable to include at least one of an ultraviolet absorber, a radical inhibitor, and a singlet oxygen quencher. |