Patent ID: 7919180

Claim:
A treated substrate having a hydrophilic region and a water repellent region on a surface of a substrate, wherein the water repellent region comprises a water repellent film formed by curing the following composition (A) and having a film thickness of from 0.1 to 100 nm: composition (A): a composition comprising a photopolymerization initiator; a compound (a) having at least one polymerizable functional group selected from the group consisting of an acryloyl group and a methacryloyl group, and a water repellent moiety; and a compound (b) having at least three polymerizable functional groups selected from the group consisting of an acryloyl group and a methacryloyl group, provided that the compound (b) may be the same as the compound (a) or a compound other than the compound (a).