what is linear blemish
linear blemish, âscratches, rubs, digs, and other similar imperfections. point blemish, âcrush, knots, dirt, stones, gaseous inclusions, and other similar imperfections. rub, âabrasion of a glass surface producing a frosted appearance.scratch ,âdamage on a glass surface in the form of a line caused by the movement of an object across and in contact with the glass surface.strain pattern, âIn heat-strengthened and fully tempered glass, a strain pattern, which is not normally visible, may become visible under certain light conditions.cratch ,âdamage on a glass surface in the form of a line caused by the movement of an object across and in contact with the glass surface. strain pattern, âIn heat-strengthened and fully tempered glass, a strain pattern, which is not normally visible, may become visible under certain light conditions.