Lubricant solution, method for producing substrate provided with lubricant coating film

A lubricant solution, comprising:

• a solvent composition which comprises a hydrochlorofluoroolefin and at least one member selected from the group consisting of 1,1,1,2,2,3,3,4,4,5,5,6,6-tridecafluorohexane, 1,1,1,2,2,3,3,4,4,5,5,6,6-tridecafluorooctane, nonafluorobutyl methyl ether, nonafluorobutyl ethyl ether and 3-methoxy-4-trifluoromethyl-1,1,1,2,2,3,4,5,5,5-decafluoropentane;
• and
• a fluorinated ether compound not having a branched structure and represented by the following formula (I-b):
• CF3O—(CF2O)q(CF2CF2O)r—CF3 (I-b)
• where q+r=40 to 180, and q/r=0.5 to 2,
• wherein the hydrochlorofluoroolefin comprises at least one member selected from the group consisting of 1-chloro-3,3,3-trifluoropropene and 1-chloro-2,3,3,4,4,5,5-heptafluoro-1-pentene,
• the content proportion of the hydrochlorofluoroolefin to the total amount of the solvent composition is from 70 to 99 mass %,
• the content proportion of the total of 1,1,1,2,2,3,3,4,4,5,5,6,6-tridecafluorohexane, 1,1,1,2,2,3,3,4,4,5,5,6,6-tridecafluorooctane, nonafluorobutyl methyl ether, nonafluorobutyl ethyl ether and 3-methoxy-4-trifluoromethyl-1,1,1,2,2,3,4,5,5,5-decafluoropentane, to the total amount of the solvent composition, and is from 1 to 30 mass %, and
• the content proportion of the fluorinated ether compound to the total amount of the lubricant solution is from 0.1 to 30 mass %.