Production method of flat panel display

A method of producing a flat panel display comprising an optical laminate wherein two optical elements are adhered to each other via an adhesive sheet or a curable resin layer, which comprises

• the following step 1-step 4, or step 1-step 5, and permits reuse of at least one of the optical elements after step 4 or step 5 as an optical element in step 1:
• step 1:
• a step of adhering two optical elements to each other via an adhesive sheet or a curable resin layer, and applying an autoclave treatment to give an optical laminate
• step 2:
• a step of checking the appearance of the optical laminate obtained in step 1
• step 3:
• a step of assembling a flat panel display using the optical laminate that passed the check in step 2
• step 4:
• a step of separating the two optical elements in an optical laminate that was rejected by the check in step 2 by relatively rotating them with a vertical line penetrating the opposing faces thereof as a rotation axis
• step 5:
• a step of washing the optical elements resulting from step 4, and
• wherein the relative rotation of the optical elements in step 4 comprises accelerating in the initial motion and rotating the two optical elements after the initial motion at a rate of not less than 0.01 (degrees/sec) and less than 50 (degrees/sec).