Heat-resistant roll, production method thereof, and method of producing sheet glass using heat-resistant roll

1. A method of producing a heat-resistant roll equipped with a roll portion containing 5% by weight or more of clay, comprising:

a grinding step of grinding a roll surface of the roll portion; and

a surface treatment step of performing surface treatment of smoothening the ground roll surface in a wet state.

2. A method of producing a heat-resistant roll according to claim 1 , wherein, in the surface treatment step, the surface treatment is performed by conducting a first step of wetting the ground roll surface and a second step of smoothening the wet roll surface.

3. A method of producing a heat-resistant roll according to claim 2 , wherein, in the second step, the roll surface is smoothened by rotating the roll portion while pressing a substrate against the wet roll surface.

4. A method of producing a heat-resistant roll according to claim 1 , wherein, in the surface treatment step, the surface treatment is performed by pressing a wet substrate against the roll surface of the rotating roll portion.

5. A method of producing a heat-resistant roll according to claim 1 , wherein, in the surface treatment step, the surface treatment is performed on the roll surface of the roll portion rotating in one circumferential direction, and subsequently, a repeated surface treatment in which the surface treatment is performed with a rotation direction of the roll portion being switched to an opposite direction is performed at least once.