账部纸：文书用的结实纸张。
象牙白纸板：用两张高品质纸张裱合而成的优质纸板。它结实、表面有光泽，特别适合请卡和名片用。
Ivory board: Good quality board manufactured by laminating two high quality sheets together. It is rigid with a bright surface especially suitable for business and invitation CARDS.
厚卡：一个普通常用词，泛指一种结实，硬身，由数张低品质纸张裱合而成的纸板。
Cardboard: a general term used to describe a stiff, strong sheet MADE up of several layers of low-quality paper pasted together.
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