The weight in pounds per ream of paper cut to its basic size. A standard ream is defined as 500 sheets.
耐用, strong writing paper originally used for bonds, now used for letterhead and other stationary.
亮度是某一波长(457纳米)的光从纸张表面反射出来的百分比，与纸张的亮或暗程度有关. 高亮度的纸张与黑色墨水形成更大的对比，使墨水颜色更生动. 低亮度纸张传统上用于书籍印刷或少量使用阅读和处理.
Collectively, 两张或两张以上的纸，通过施加压力将图像从上面的纸转移到下面的一张或多张纸上, without the use of a carbon sheet.
Also referred to as card stock; a heavyweight paper designed to be used as booklet, magazine covers or brochures.
一种打印技术，通过将电子文件从计算机传输到或通过其他数字存储设备传输到打印机，从而将文件或图像传送到打印机, either a digital press or an inkjet device. 数字 printing is best suited for smaller runs.
将油墨从印版转移到橡皮布或滚筒上，从而产生一幅原始图像的多个印痕的过程, then to the surface of the print media. Offset printing is best suited to larger runs.
纸张阻挡光线透射和印刷显示的能力. It is particularly important in two-sided printing. It also affects readability and overall appearance. 不透明度 is improved by scattering, absorbing or reflecting light. 二氧化钛和碳酸钙等填充物会散射光线, while blue and violet dyes absorb it.
Fiber derived from previously manufactured and consumed paper, having been discarded after its original use life.
空气中所含的水分，以一定温度下空气中所能容纳的最大水分的百分比表示. Ideal printing conditions call for a RH at 45%.
The extent to which paper can run in printing, converting and other processing equipment, without jamming, breaking or otherwise causing mechanical failure.
纸张的内部施胶影响吸光度、强度和持久性. External sizing improves resistance to water, ink and other fluids, seals down surface fibers and improves surface strength. 典型的施胶剂有松香、胶水、明胶、淀粉树脂、蜡等.
A quality measured by tests for burst, 眼泪, tensile and folding strength, 每一种方法都测量纸张承受不同方向力的能力.
The Technical Association of the 纸浆 and 纸 Industry, 在纸浆和纸张的制造和使用方面建立了公认的技术标准和测试程序，是一个颇受尊敬的专业组织.
A paper finish characterized by a slightly rough or toothy surface. Vellum finish should not be confused with vellum paper, which is a transluscent paper used primarily for drafting.