A polyarylate resin is represented by general formula (1) shown below. In general formula (1), R.sup.1 represents a hydrogen atom or methyl group. R.sup.2 and R.sup.3 each represent a hydrogen atom or an alkyl group having a carbon number of at least 1 and no greater than 4. R.sup.2 and R.sup.3 are not the same as one another. When R.sup.1 represents a hydrogen atom, R.sup.2 and R.sup.3 are not bonded to one another. When R.sup.1 represents a methyl group, R.sup.2 and R.sup.3 are optionally bonded to one another to form a ring. r and s each represent a number greater than or equal to 0 and less than or equal to 49. t and u each represent a number greater than or equal to 1 and less than or equal to 50. r+s+t+u=100. r+t=s+u. ##STR00001##

An X-ray-sensitive film includes an acid-hydrolyzed palm mesocarp, a starch, a cellulose, a synthetic polymer, a plant hydrogel, a cyanoacrylate adhesive, glycerin, and an x-ray-sensitive dye. A method of preparing the X-ray-sensitive film includes 32.5 to 45 wt % cellulose based on a total weight of the X-ray-sensitive film, a tensile modulus of 0.75 to 2.5 GPa, a tensile strength of 75 to 125 MPa/kg.Math.m.sup.3, a water absorption of 0.00 to 0.16% measured according to ASTM D570, a carbonate content of 100 to 200 ppm, and shows no cracks when tested according to ASTM D5419.

An X-ray-sensitive film includes an acid-hydrolyzed palm mesocarp, a starch, a cellulose, a synthetic polymer, a plant hydrogel, a cyanoacrylate adhesive, glycerin, and an x-ray-sensitive dye. A method of preparing the X-ray-sensitive film includes 32.5 to 45 wt % cellulose based on a total weight of the X-ray-sensitive film, a tensile modulus of 0.75 to 2.5 GPa, a tensile strength of 75 to 125 MPa/kg.Math.m.sup.3, a water absorption of 0.00 to 0.16% measured according to ASTM D570, a carbonate content of 100 to 200 ppm, and shows no cracks when tested according to ASTM D5419.

A polyarylate resin is represented by general formula (1) shown below. In general formula (1), R.sup.1 represents a hydrogen atom or methyl group. R.sup.2 and R.sup.3 each represent a hydrogen atom or an alkyl group having a carbon number of at least 1 and no greater than 4. R.sup.2 and R.sup.3 are not the same as one another. When R.sup.1 represents a hydrogen atom, R.sup.2 and R.sup.3 are not bonded to one another. When R.sup.1 represents a methyl group, R.sup.2 and R.sup.3 are optionally bonded to one another to form a ring. r and s each represent a number greater than or equal to 0 and less than or equal to 49. t and u each represent a number greater than or equal to 1 and less than or equal to 50. r+s+t+u=100. r+t=s+u.

##STR00001##

An X-ray-sensitive film includes an acid-hydrolyzed palm mesocarp, a starch, a cellulose, a synthetic polymer, a plant hydrogel, a cyanoacrylate adhesive, glycerin, and an x-ray-sensitive dye. A method of preparing the X-ray-sensitive film includes 32.5 to 45 wt % cellulose based on a total weight of the X-ray-sensitive film, a tensile modulus of 0.75 to 2.5 GPa, a tensile strength of 75 to 125 MPa/kg.Math.m.sup.3, a water absorption of 0.00 to 0.16% measured according to ASTM D570, a carbonate content of 100 to 200 ppm, and shows no cracks when tested according to ASTM D5419.

An X-ray-sensitive film includes an acid-hydrolyzed palm mesocarp, a starch, a cellulose, a synthetic polymer, a plant hydrogel, a cyanoacrylate adhesive, glycerin, and an x-ray-sensitive dye. A method of preparing the X-ray-sensitive film includes 32.5 to 45 wt % cellulose based on a total weight of the X-ray-sensitive film, a tensile modulus of 0.75 to 2.5 GPa, a tensile strength of 75 to 125 MPa/kg.Math.m.sup.3, a water absorption of 0.00 to 0.16% measured according to ASTM D570, a carbonate content of 100 to 200 ppm, and shows no cracks when tested according to ASTM D5419.