4805.93.40.15 - Wet machine board

This classification covers "Wet machine board," a type of paperboard manufactured using a wet-forming process. It is characterized by its substantial weight, falling under the designation of paper and paperboard weighing 225 g/m² or more. This material is generally uncoated and is presented in rolls or sheets. The "wet machine board" designation specifically refers to paperboard produced by a particular manufacturing method that imparts distinct physical properties, often making it suitable for applications requiring high absorbency or specific structural integrity when wet.

Distinguishing this category from its siblings, "folding carton board" is typically designed for box construction with specific folding and creasing properties. "Construction paper" is usually a colored, uncoated paper intended for arts and crafts. "Linerboard" is primarily used as a facing material in corrugated board, and its composition, particularly the percentage of chemical sulfate wood pulp, is a key differentiator. "Tube and core board" is specifically engineered for the production of cylindrical tubes and cores. This category, "Wet machine board," stands apart due to its manufacturing process and inherent properties, often leading to uses in packaging where moisture resistance or absorbency is a factor, or as a component in other manufactured goods where its specific wet strength characteristics are utilized.

As this node is a leaf node within the HTS, there are no further subdivisions. Therefore, classification under 4805.93.40.15 relies on identifying the material as wet machine board and ensuring it meets the general criteria for uncoated paper and paperboard weighing 225 g/m² or more, which is not further processed beyond the basic forms described in Note 3 to Chapter 48.