The invention discloses a
dyeing liquid for preparing a zirconia false tooth
ceramic blank in a gradient color. The
dyeing liquid includes a
solvent, a colorant, a surfactant, a
permeation fortifier,an inorganic additive and an
antibacterial agent, wherein the
mass ratio of the
solvent to the colorant to the
permeation fortifier to the inorganic additive is (5-10):(2-3):1:(0.5-1), and the
permeation fortifier is a mixture of an
alcohol ether ester
solvent,
propylene glycol carbonate, acyl alaninate and
hydrophobin. The coloring permeation depth of the
dyeing liquid on the zirconia false toothceramic blank is greater than 5mm, the permeation time is short, and permeation on the surface of a
ceramic or in the vertical direction of the
ceramic is uniform; by adding the natural antibacterialagent into the dyeing liquid, the probability of
inflammation of false tooth gingiva can be reduced; by adding
inorganic ions into the dyeing liquid, the optical effect of the false tooth ceramic blank is obviously improved, and the transparency of the false tooth ceramic blank is enhanced.