A paper sheet is providing having a basis weight of 50 to 80 g/m2, and having a top surface and a bottom surface, said paper sheet comprising 10%-80% by weight of hardwood kraft pulp; and 10%-70% by weight of sulfite pulp; wherein the paper sheet has an MD/CD TSI ratio of 1.25 to 2.15, and a fiber hygroexpansion stress transfer parameter (ω) of less than 0.1.
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机译：提供一种纸张，其基重为50至80g / m 2 ，并且具有顶表面和底表面，所述纸张包括按重量计10％-80％的硬木牛皮纸浆。 ;和按重量计10％-70％的亚硫酸盐纸浆;其中所述纸张的MD / CD TSI比为1.25至2.15，并且纤维湿膨胀应力转移参数（ω）小于0.1。
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