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The table shows how the two systems rate high-brightness papers, but there is no simple way to convert between the two systems because the test methods are so different. [4] The ISO rating is higher and can be over 100. This is because contemporary white paper incorporates fluorescent whitening agents (FWA). Because the ISO standard only ...
To start, a diluted cleaning solution (white vinegar, bleach and detergent) is sprayed onto all surfaces to be cleaned, Using the same machine, the area is then rinsed; this is typically followed by vacuum suctioning that removes the applied liquid along with the suspended solids and dissolved contaminants that have been removed from the surface.
Recycling of used paper before the industrialisation of paper production, rag paper was recycled to make low-grade board. A process for removing printing inks from recycled paper was invented by German jurist Justus Claproth in 1774. [2] He practiced together with German paper producer Johann Engelhard Schmid. Today this method is called deinking.
This is an accepted version of this page This is the latest accepted revision, reviewed on 29 September 2024. Not to be confused with sodium chloride. Sodium chlorite The sodium cation Space-filling model of the chlorite anion Names IUPAC name Sodium chlorite Other names Chlorous acid, sodium salt Textone Identifiers CAS Number 7758-19-2 Y 49658-21-1 (trihydrate) Y 3D model (JSmol) Interactive ...
It is a white crystalline powder that is readily soluble in water. It is hygroscopic. It decomposes above 300 °C to release oxygen [4] and leaves sodium chloride. Several hundred million tons are produced annually, mainly for applications in bleaching pulp to produce high brightness paper. [7]
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Paper chemicals designate a group of chemicals that are used for paper manufacturing, or modify the properties of paper. These chemicals can be used to alter the paper in many ways, including changing its color and brightness, or by increasing its strength and resistance to water. [1] The chemicals can be defined on basis of their usage in the ...
Active oxygen bleaching agents include sodium perborate, sodium percarbonate, sodium perphosphate, sodium persulfate, and urea peroxide. These compounds release hydrogen peroxide during the wash cycle, but the release of hydrogen peroxide is low when these compounds are used in temperatures below 45 °C (113 °F).
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