4805.50.00.00 - Felt paper and paperboard

This classification encompasses felt paper and paperboard. These materials are characterized by their fibrous structure, typically achieved through a wet felting process. Unlike many other papers or paperboards, felt paper and paperboard often have a more irregular surface, a characteristic that arises from the interlocking fibers during manufacturing. They are generally not further processed beyond this basic formation into rolls or sheets.

Within the broader category of "Other uncoated paper and paperboard, in rolls or sheets, not further worked or processed than as specified in note 3 to this chapter," felt paper and paperboard are distinct. While siblings like fluting paper or testliner are designed for specific structural purposes (e.g., corrugated board), and filter paper is engineered for its permeability and filtration capabilities, felt paper and paperboard's primary classification is based on its manufacturing method and resulting texture. The "Other" category serves as a residual for uncoated papers and paperboards not specifically enumerated elsewhere within heading 4805 that meet the general criteria of the heading.

As this is a leaf node, there are no further subdivisions. Classification within 4805.50.00.00 is therefore determined by whether the product is indeed felt paper or paperboard, as defined by its manufacturing process and inherent physical characteristics, and not specifically described or classified elsewhere within the Harmonized System.