7013.42 - Of glass having a linear coefficient of expansion not exceeding 5 x 10-6 per Kelvin within a temperature range of 0˚C to 300˚C:

This HTS category, 7013.42, specifically covers glassware intended for table, kitchen, or similar domestic purposes, which possesses a high degree of thermal resistance. The defining characteristic is a linear coefficient of expansion not exceeding 5 x 10⁻⁶ per Kelvin within a temperature range of 0°C to 300°C. This indicates a material that exhibits minimal expansion or contraction when subjected to significant temperature fluctuations, making it suitable for applications involving heat or rapid temperature changes, such as cookware or heat-resistant serving dishes.

This classification distinguishes itself from its sibling category, 7013.41, which exclusively pertains to glassware made of lead crystal. While both fall under the broader umbrella of glassware for table and kitchen use, 7013.42 focuses on the material's thermal properties rather than its composition of lead oxides. Therefore, items that are heat-resistant but do not contain lead crystal would be classified here.

Within this category, further subclassification exists to refine the nature of the glassware. The subcategory 7013.42.10.00 addresses glassware that has undergone a process of being pressed and toughened, also known as specially tempered. This typically imparts increased strength and durability. The "Other" subcategory encompasses all remaining glassware that meets the thermal expansion criteria but does not fall under the pressed and toughened designation.