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Pulp is a fibrous lignocellulosic material prepared by chemically, semi-chemically or mechanically producing cellulosic fibers from wood, fiber crops, waste paper, or rags. Mixed with water and other chemicals or plant-based additives, pulp is the major raw material used in papermaking and the industrial production of other paper products. [1] [2]
Tissue paper sheet. Tissue paper, or simply tissue, is a lightweight paper or light crêpe paper.Tissue can be made from recycled paper pulp on a paper machine.. Tissue paper is very versatile, and different kinds are made to best serve these purposes, which are hygienic tissue paper, facial tissues, paper towels, as packing material, among other (sometimes creative) uses.
Paper Coating 1) The paper or board 2) The first layer of coating to even out the surface 3) A second layer for an even smoother and whiter surface. Pigments that absorb in the yellow and red part of the visible spectrum can be added. As the dye absorbs light, the brightness of the paper will decrease, unlike the effect of an optical ...
Wood-free paper is made from non-wood materials, such as cotton, hemp, linen, and bamboo. [18] [27] [28] It is often used in applications where a high-quality, durable paper is needed, such as for printing, writing, and packaging. There are two main types of wood-free paper: Tissue pulp: This is the most common type of wood-free paper.
The density of paper ranges from 250 kg/m 3 (16 lb/cu ft) for tissue paper to 1 500 kg/m 3 (94 lb/cu ft) for some specialty paper. Printing paper is about 800 kg/m 3 (50 lb/cu ft). [22] Paper may be classified into seven categories: [23] Printing papers of wide variety. Wrapping papers for the protection of goods and merchandise. This includes ...
Hardwoods are raw material that are preferred for pulp used in printing papers. It has small dimensions in its fibres, which can be useful for small-scale uniformity, opacity, and surface smoothness, all important for printing paper. [2] Softwoods are the preferred raw material for strong papers, due to the length and slimness of the fibres.