Glass article and manufacturing method therefor

A method of manufacturing a glass article, the method comprising:

• a preparation step of preparing a glass preform comprising a first thin-walled portion at a center portion of the glass preform in a width direction and a first thick-walled portion thicker than the first thin-walled portion only at each of both end portions of the glass preform in the width direction;
• a forming step of drawing the glass preform downward while heating and softening the glass preform through use of a redraw method, to thereby form a glass ribbon comprising a second thin-walled portion having a thickness of 10 μm or less at a center portion of the glass ribbon in a width direction and a second thick-walled portion thicker than the second thin-walled portion only at each of both end portions of the glass ribbon in the width direction;
• and
• an article formation step of obtaining a glass article from the glass ribbon,
• wherein the forming step comprises:
• arranging a drawing roller, which is configured to draw the glass preform;
• and bringing the drawing roller into contact with only the second thick-walled portion of the glass ribbon,
• wherein the article formation step comprises superimposing a protective sheet on the glass ribbon, and taking up the protective sheet and the glass ribbon into a roll shape, and
• wherein, in the roll shape, the protective sheet covers an entire width of the glass ribbon including the second thin-walled portion and the second thick-walled portion and the protective sheet extends beyond an outer edge of the second thick-walled portion.