A method of producing a case frame (110, 120), the method comprising: forming the case frame (110, 120); forming a first painting layer with a color of a material applied to a surface of the formed case frame (110, 120); depositing a transparent oxide deposition layer having a refractive index on an upper portion of the first painting layer; and forming a second painting layer on an upper portion of the transparent oxide deposition layer; wherein the depositing of the oxide deposition layer comprises alternating deposition of at least two different types of deposition materials a plurality of times and wherein the depositing of the oxide deposition layer includes: depositing a first deposition material having a first refractive index and formed by at least two types of mixtures selected from SiO 2 -TiO2, Al 2 O 3 -TiO 2, SiO 2 -ZrO 2, Al 2 O 3 -ZrO 2, and SiO 2 -Ta 2 O 5; and depositing a second deposition material having a second refractive index and formed by at least two types of mixtures selected from SiO 2 -TiO 2, Al 2 O 3 -TiO 2, SiO 2 -ZrO 2, Al 2 O 3 -ZrO 2, and SiO 2 -Ta 2 O 5, wherein deposition is achieved by alternating deposition of the first deposition material and the second deposition material a plurality of times and wherein the first refractive index is different from the second refractive index. forming the case frame (110, 120); forming a first painting layer with a color of a material applied to a surface of the formed case frame (110, 120); depositing a transparent oxide deposition layer having a refractive index on an upper portion of the first painting layer; and forming a second painting layer on an upper portion of the transparent oxide deposition layer; wherein the depositing of the oxide deposition layer comprises alternating deposition of at least two different types of deposition materials a plurality of times and wherein the depositing of the oxide deposition layer includes: depositing a first deposition material having a first refractive index and formed by at least two types of mixtures selected from SiO 2 -TiO2, Al 2 O 3 -TiO 2, SiO 2 -ZrO 2, Al 2 O 3 -ZrO 2, and SiO 2 -Ta 2 O 5; and depositing a second deposition material having a second refractive index and formed by at least two types of mixtures selected from SiO 2 -TiO 2, Al 2 O 3 -TiO 2, SiO 2 -ZrO 2, Al 2 O 3 -ZrO 2, and SiO 2 -Ta 2 O 5, wherein deposition is achieved by alternating deposition of the first deposition material and the second deposition material a plurality of times and wherein the first refractive index is different from the second refractive index. depositing a first deposition material having a first refractive index and formed by at least two types of mixtures selected from SiO 2 -TiO2, Al 2 O 3 -TiO 2, SiO 2 -ZrO 2, Al 2 O 3 -ZrO 2, and SiO 2 -Ta 2 O 5; and depositing a second deposition material having a second refractive index and formed by at least two types of mixtures selected from SiO 2 -TiO 2, Al 2 O 3 -TiO 2, SiO 2 -ZrO 2, Al 2 O 3 -ZrO 2, and SiO 2 -Ta 2 O 5, wherein deposition is achieved by alternating deposition of the first deposition material and the second deposition material a plurality of times and wherein the first refractive index is different from the second refractive index.