[1] The pulp or fibers used in printing and writing papers are extracted from wood using a chemical or mechanical process.
This standard describes the paper sizes under what the ISO calls the A, B, and C series formats.
[4] These include, among others, ink adhesion, light sensitivity, waterproofing, compatibility with thermal or PSA overlaminate, and glossy or matte finish.
[3] The history of paper is often attributed to the Han dynasty (25-220 AD) when Cai Lun, a Chinese court official and inventor, made paper sheets using the “bark of trees, remnants of hemp, rags of cloth, and fishing nets.”[5] Cai Lun's method of papermaking received praise during his time for offering a more convenient alternative to writing on silk or bamboo tablets, which were the traditional materials in ancient Chinese writing.
Today, even with the presence of modern tools and machines for papermaking, most processes still involve the traditional steps that Cai Lun employed, namely the process of soaking felted fiber sheets in water, draining the water, and then drying the fiber into thin sheets.