Provided is an opaque imparting liquid which is a liquid material that is applied to a portion of a high-transparency zirconia crown, does not undergo coloring, and is capable of adjusting only transparency. The opaque imparting liquid according to the present invention is used in an affixing device for cutting from zirconium oxide for dental cutting, and comprises: (a) 10-39 wt% of a water-soluble aluminum compound and/or a water-soluble lanthanum compound; (b) 60 to 89 wt% of water; and (c) 1 to 20 wt% of an organic solvent.