Opacity of paper – printing opacity

Posted on March 31, 2020 by admin

Opacity is an important optical property of paper. The opacity of paper is also known as printing opacity. It is expresses as a percentage. It means as the percentage of visible light that does not transmit through a sheet of paper. The most of the printing papers fall within the Read more

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Dispersing Agent for Paper Making

Posted on September 21, 2019 by admin

Dispersing agent is used in paper making process as additive to provide uniform stock by separating fiber or particles and to prevent clumping and setting. It is a polymer compound with high molecular weight. Normally it is white fine granulated powder. Dispersing agent is water Read more

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Rhodamine b dye

Posted on April 14, 2019 by admin

Rhodamine B is a organic compound and it is a basic dye. In paper mill it is used as dye for making pink color paper. The chemical formula of Rhodamine B is C28H31N2O3Cl. The IUPAC name of the compound is [9-(2-carboxyphenyl)-6-(diethylamino)xanthen-3-ylidene]-diethylazanium-chloride. It Read more

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Bursting strength of paper

Posted on November 12, 2018 by admin

Bursting strength machine is used to test strength of the different kinds of paper and paperboard. The operating system of the tester is very easy. It is very important and widely used measurement. It is defined as the required minimum amount of hydrostatic pressure to rapture the paper or Read more

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Secondary fiber

Posted on September 19, 2018 by admin

The fibers that are already used for paper manufacturing process are known as secondary fiber or recycled fiber. Different grade of waste paper are the sources of it. Even, dry end broke, cutter and finishing section broke are also included in secondary fiber. This fiber is an important part for Read more

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Paper mill wood chipper

Posted on August 1, 2018 by admin

Wood chipper is used in paper mill to produce chips from pulpwood so that cooking chemicals penetrate the wood quickly, completely and uniformly during manufacturing of chemical pulp or mechanical pulp. The process from pulpwood to chips is known as chipping process. The sizes of the good quality Read more

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Optical brightening agents in paper

Posted on April 6, 2018 by admin

Optical brightening agents are additives which are used in the paper industries to enhance whitening effects of papers. These chemical compounds absorb light in the ultraviolet and violet region (usually 340-370nm) and re-emit light in the blue region (typically 420-470 nm). It gives a Read more

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Paper machine headbox

Posted on December 16, 2017 by admin

The paper machine headbox is an equipment that supply very low consistency stock into the forming section uniformly. The formation and uniformity of the final paper product depends on the dispersion of the fiber and fillers. The furnish delivery system varies on the construction of the headbox. Read more

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Kappa number of pulp

Posted on November 25, 2016 by admin

The Kappa number of pulp is an indication of the lignin content or bleachability of pulp. We use it to estimate the required amount of bleach chemicals to achieve targeted brightness. If the kappa number value is higher then, the required bleaching chemicals are also higher. On the other hand low Read more

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Hydrogen peroxide bleaching

Posted on July 4, 2016 by admin

Hydrogen peroxide is a total chlorine free (TCF) bleaching agent. It is appropriate for chemical, mechanical and recycled pulp to achieve a wide range of brightness. It has both oxidizing and reducing properties which is pH depended. The chemical formula of this bleach is H2O2. Pure hydrogen Read more

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