Cutting fluid, cutting method, and smoothness improver for cut surface

Abstract

A cutting fluid comprising a sugar solution containing any sugar alcohol selected from among sorbitol, reduced starch syrup and reduced maltose syrup and having a viscosity of 9.7 mPa·s or more. According to the present invention, the cut surface can have improved smoothness and, hence, the polishing step which has conventionally been conducted after cutting can be shortened, simplified, or omitted to greatly contribute to an improvement in working efficiency. Furthermore, since chipping can be diminished, the present invention can greatly contribute to an improvement in the precision of the shape or dimensions of works or to an improvement in yield.

1 - 5 . (canceled) 
     
     
         6 . A cutting method having a step of cutting a workpiece material by fixed abrasive machining with a wire saw using, as a cutting fluid, a sugar solution containing any sugar alcohol selected from sorbitol, reduced starch syrup and reduced maltose syrup. 
     
     
         7 . A cutting method having the step of cutting a workpiece material using, as a cutting fluid, a sugar solution containing any sugar alcohol selected from sorbitol, reduced starch syrup and reduced maltose syrup and having said sugar alcohol concentration of 35% by mass or higher. 
     
     
         8 . The cutting method according to  claim 7 , wherein said sugar alcohol concentration in said sugar solution is 50% by mass or higher.