Method of evaluating optical information medium

Abstract

A method for transferring an artificial fingerprint liquid to a surface of an optical information medium includes preparing a pseudo-fingerprint transferring stamp which is a plug made of silicone rubber, applying an artificial fingerprint liquid containing a fine-particle-form substance and a dispersion medium capable of dispersing the fine-particle-form substance onto a polycarbonate substrate by spin coating to prepare a master plate for artificial fingerprint liquid transfer, pressing said one end face of the transferring stamp with a load of 4.9 N for 10 seconds against the surface of the master plate, and then, pressing said one end face of the transferring stamp onto which the artificial fingerprint liquid is transferred against a surface of an optical information medium.

1 . A method for transferring an artificial fingerprint liquid to a surface of an optical information medium, the method comprising: 
 preparing a pseudo-fingerprint transferring stamp which is a plug made of silicone rubber, and one end face of said plug being roughened by polishing with an abrasive,    applying an artificial fingerprint liquid containing a fine-particle-form substance and a dispersion medium capable of dispersing the fine-particle-form substance onto a polycarbonate substrate by spin coating to prepare a master plate for artificial fingerprint liquid transfer,    pressing said one end face of the transferring stamp with a load of 4.9 N for 10 seconds against the surface of the master plate onto which the artificial fingerprint liquid is applied, so as to transfer the artificial fingerprint liquid onto the transferring stamp, and then,    pressing said one end face of the transferring stamp onto which the artificial fingerprint liquid is transferred against a surface of an optical information medium to be evaluated with a load of 4.9 N for 10 seconds, so as to transfer the artificial fingerprint liquid onto the surface of the medium.    
   
   
       2 . The method according to  claim 1 , wherein said one end face of the pseudo-fingerprint transferring stamp has a diameter of 8 to 25 mm.  
   
   
       3 . The method according to  claim 1 , wherein said one end face of the pseudo-fingerprint transferring stamp is roughened by polishing with a #240 abrasive paper.  
   
   
       4 . The method according to  claim 1 , wherein the artificial fingerprint liquid contains Kanto loam of class 11 test powder 1 prescribed in JIS Z8901 as the fine-particle-form substance, and triolein as the dispersion medium.  
   
   
       5 . The method according to  claim 1 , wherein the artificial fingerprint liquid contains 0.4 parts by weight of Kanto loam of class 11 test powder 1 prescribed in JIS Z8901 as the fine-particle-form substance, and 1 part by weight of triolein as the dispersion medium.