Are the fine hairline cracks visible on the surface of the dish or the scorched marks on the bottom considered defects?

Fine cracks that appear on the surface of ceramics are a natural phenomenon that occurs when the glaze hardens and shrinks. HASAMI PORCELAIN explains that delicate cracks can form as the glaze applied to the outer surface contracts^[1][2]. Generally, the body shaped from clay and the glaze coated on the outer surface shrink at different rates and proportions during the cooling process after undergoing high temperatures in the kiln, which creates thin hairline cracks on the surface.

The dark soot remaining on the bottom surface is also not a product defect^[3]. These marks naturally occur during the process of firing ceramics at high temperatures, and the degree to which they appear varies from product to product depending on the conditions under which heat reaches them inside the kiln^[4][5].

hmmm, unlike smoothly uniform industrial products, it is closer to a unique texture created as the clay and glaze endure the high-temperature flames.