Composite stationery articles are classified by the component that imparts the essential character of the finished product. A notebook with a paperboard cover and metal spiral binding is typically classified as a paper product, but a binder with a substantial plastic or metal structure may shift classification. Importers should document the material composition and consult a customs broker when non-paper components are significant.

Yes, imported stationery products must be marked with their country of origin under US Customs regulations. Origin is determined by the substantial transformation rule—the country where the last substantial transformation occurred that resulted in a new and different article. For stationery, this is typically the country where the paper is converted into the finished product, not necessarily where the base paper was manufactured.