Poly(vinyl alcohol) mold release film for artificial marble molding use, and method for producing artificial marble using same

A polyvinyl alcohol mold release film for artificial marble molding use, which is to be placed between a stock solution that serves as a raw material for artificial marble and a shaping apparatus when the stock solution is fed to the shaping apparatus, solidified and molded, the mold release film being characterized by being a polyvinyl alcohol film and satisfying the following formula (1),

• 4.6×10−3≥Δn(MD)0−1.4×10−3≥Δn(TD)0≥1.0×10−3 (1)
• in the formula (1), Δn(MD)0 represents a value determined from a birefringence index of the polyvinyl alcohol mold release film in the machine direction at a center part of a transverse direction of the film by averaging the birefringence index along a thickness direction of the film, and Δn(TD)0 represents a value determined from a birefringence index of the polyvinyl alcohol mold release film in the transverse direction at the center part of the transverse direction of the film by averaging the birefringence index along the thickness direction of the film.