Bond: Range of heavier substance printing and writing papers often used for letterheads, invoices, etc. Usual range is from 63 g/sq.m to 120 g/sq.m.

• 高级书写纸:定量从63克到120克每米平米之间的印刷和书写纸张，俗称二号纸。常作信笺，发票等用。