Grades of Pulp and Paper

<body> <p>This page contains list of various types of pulp and paper based on their end use, process of manufacturing, raw material used etc. Papers can be graded in 'n' numbers of ways and if we count all permutation and combination of grades total grades may well exceed 10000.</p> <p>This page contains list of various types of pulp  based on their pulping process, raw material used  or type of bleaching etc. All plant material are basically consist of Cellulose Fiber, Hemicellulose and Lignin, which bind cellulose fibers together. Pulping is nothing but breaking/removing lignin to separate fibers. Lignin is physically and chemically weaker than cellulose fiber. Hence when a physical force or chemical is applied to plant (wood, grass, straw, rag etc.), lignin breaks down faster than cellulose. Heat also weaken lignin faster than cellulose fiber.</p> <p>This page contains various properties of paper, how these properties are measured and how are they relevant to end user and/or papermaker. Under TAPPI standard all tests are carried out at 23°C + 1°C and 50 + 2% relative humidity</p> <p><font size="3">The three most important Parameters which defines the pulp are. </font><font size="4">1.) Fiber Length, 2.) Brightness, 3.) Pulping process used</font><font size="3">. e.g. Northern Soft Wood Bleached Kraft (NSWBK). The Northern Soft Wood tells it is long fiber pulp. Bleached tells, it has high brightness and Kraft tells that Kraft (Sulfate) pulping process is used to produced this pulp. Similarly Southern Hard Woof Unbleached Kraft, will be a short fiber wood unbleached (low brightness) pulp made by kraft process. Link to a few typical Market Pulp data sheets</font> </p> <p>Two most important properties of any papermaking cellulosic raw material are, how much cellulose fiber it has and how long the fibers are. The amount of cellulose fiber in wood determines the pulp yield, ease of pulping and cost of pulp produced. The importance of fiber length is explained in pulp properties. The maximum average fiber length pulp will have is that of wood because whatever pulping method, full chemical to full mechanical, fiber is going to damage. In mechanical pulping the damage is physical (cutting, bruising etc.) and in chemical pulping it is chemical degradation (lower degree of polymerization).</p> <p>Types of Paper, Grades of paper, types of Paperboard, Grades of paperboard, types of tissue, Grades of tissue, types of board, Grades of board, types of pulps, grades of pulp, standard sizes of paper, size of cut paper, ream weight.</p> <p>ISO paper sizes, International Standard Organization paper sizes, A series paper size, B series paper size,</p> <p>C series paper size, RA series paper size, SRA series paper sizes, envelope sizes,</p> <p>US paper sizes, English paper sizes, US paper ream weight, US paper basis weight,</p> <p>paper thickness, paper caliper, paperboard thickness, paperboard caliper, paper bulk, paper density, paperboard density</p> <p>This page contains more than 200 grades of pulp and paper.</p> </body>