Cosmetic process for attenuating wrinkles

Cosmetic process for caring for the skin comprising:

• (i) a step consisting in applying to the skin a cosmetic composition, comprising, in a physiologically acceptable medium, at least 0.3% by weight, relative to the total weight of the composition, of a grafted polysaccharide polymer of formula (I):
• PS—(CO—NH-L-X)a(COOH)b
• in which PS denotes the basic backbone of a polysaccharide bearing the carboxylic acid groups;
• L is a linear, branched or cyclic, saturated or unsaturated divalent hydrocarbon-based group comprising from 1 to 20 carbon atoms which may be interrupted with one or more non-adjacent heteroatoms chosen from sulfur, oxygen, or an —NH—, —COO—, —CONH—, —O—CO—NH— or —NH—CO—NH— group, said divalent group being optionally substituted with one or more groups chosen from hydroxyl, amine, thiol, carboxylic acid, amide and cyano groups;
• X denotes a photoactive group of azide or diazirine type;
• a denoting the content of COOH groups substituted with the group —NH-L-X;
• b denoting the content of unsubstituted free COOH groups;
• a being between 0.01 and 0.8;
• b being between 0.2 and 0.99
• a+b=1
• (ii) a step comprising exposing the skin to light radiation.