Cassette for loading glass and glass treatment method

A cassette for loading glass, the cassette comprising:

• a first frame extending in a first direction;
• a second frame spaced apart from the first frame in a second direction intersecting the first direction;
• a first support coupled to the first frame;
• and
• a second support coupled to the second frame,
• wherein a plurality of first grooves are defined in the first support,
• the plurality of first grooves are spaced apart from each other in the first direction,
• each of the plurality of first grooves extends in a third direction intersecting the first direction and the second direction, and
• the first support includes a plurality of first protrusions protruding from an inner surface of each of the plurality of first grooves in directions that intersect a portion of the inner surface from which the first protrusions protrude,
• in a cross-section orthogonal to the third direction, each of the first grooves is a continuously curved surface that includes a first surface and a second surface that face each other,
• the first protrusions are positioned on each of the first and second surfaces, and
• at least some of the first protrusions on the first surface extend in different directions, and at least some of the first protrusions on the second surface extend in different directions.