Surface processing method for casing

Abstract

A surface processing method for a casing is disclosed. The method includes the following steps: performing an anodic treatment to a casing material, drying the casing material and printing a pattern on the casing material via digital printing. The method can reduce the surface processing cost and provide the appearance of the object with diverse patterns or colors.

1 . A surface processing method for a casing, comprising following steps:
 performing an anodic treatment to a casing material;   drying the casing material; and   printing a pattern on the casing material via digital printing.   
     
     
         2 . The surface processing method for a casing according to  claim 1 , wherein the casing material includes aluminum or aluminum alloy. 
     
     
         3 . The surface processing method for a casing according to  claim 1 , wherein the digital printing is a non-impact printing. 
     
     
         4 . The surface processing method for a casing according to  claim 3 , wherein the non-impact printing is performed with charged ink. 
     
     
         5 . The surface processing method for a casing according to  claim 4 , a plurality of holes is formed at the surface of the casing material. 
     
     
         6 . The surface processing method for a casing according to  claim 5 , wherein in the non-impact printing sprays out the charged ink, the charged ink passes through an electric field and fills into the holes according to the charges of the charged ink.