4911.91.20 - Not over 0.51 mm in thickness

This HTS category, 4911.91.20, specifically classifies printed pictures and photographs that are not over 0.51 mm in thickness. This subcategory falls under "Other printed matter, including printed pictures and photographs" and is further refined by being lithographically printed on paper or paperboard. The key defining characteristic for this classification is the physical thickness of the printed material.

It is important to distinguish this category from its sibling, 4911.91.30, which covers the same types of lithographs printed on paper or paperboard but are *over* 0.51 mm in thickness. Therefore, the precise measurement of the material's caliper is the critical factor in determining correct classification between these two headings. Both presume the item to be a lithograph, printed, and within the last 20 years at the time of importation, but the thickness dictates placement.

Within this classification, further subdivisions exist to provide more granular detail. The subcategory 4911.91.20.20 specifically addresses posters, which are often characterized by their size and intended purpose for public display. The remaining items that meet the primary criteria of being a lithograph on paper or paperboard, not exceeding 0.51 mm in thickness, but are not classified as posters, will fall under the "Other" subcategory, 4911.91.20.40.