Single-sheet printed matter — whether flat or folded — encompasses a wide range of commercial and informational products, from product brochures and instruction leaflets to promotional flyers, all sharing the characteristic of being produced on a single substrate rather than bound. Trade volumes in this category are driven heavily by marketing, retail packaging inserts, and pharmaceutical labeling supply chains. Importers sourcing high-volume leaflet runs from offshore printers should pay close attention to whether the product remains a single sheet after folding, as multi-sheet collation shifts classification to bound-book headings.

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