4810.19 - Other:

This HTS category, 4810.19, covers paper and paperboard that is coated on one or both sides with kaolin (China clay) or other inorganic substances, with or without a binder, and with no other coating. Crucially, these papers and paperboards are intended for writing, printing, or other graphic purposes, and do not contain significant amounts of mechanically or chemo-mechanically processed fibers. This distinction from papers with higher mechanical fiber content is a key classification determinant.

The primary differentiator for this "Other" category lies in its format and weight characteristics relative to its siblings. Unlike 4810.13, which specifically covers paper and paperboard in rolls, or 4810.14, which defines sheets by their specific unfolded dimensions (one side not exceeding 435 mm and the other not exceeding 297 mm), 4810.19 encompasses a broader range of formats or dimensions that do not fit the precise roll or specific sheet size criteria of its siblings.

Within 4810.19, further classification is based on the weight per square meter of the paper or paperboard. The subcategories distinguish between products weighing not more than 150 g/m² and those weighing more than 150 g/m². This distinction in basis weight is a common and critical factor in classifying paper and paperboard products, reflecting differences in their physical properties and intended applications.