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    Optical Brightener - an overview | ScienceDirect Topics

    Optical brighteners. After World War II the chemists of the German company Farbenfabriken Bayer in Leverkusen found a replacement for the washing blue being used as the optical brightener. In contrast to blueing, where the yellowness of the laundry is compensated to a light grey, perceived as being 'whiter' by the human eye, optical .

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    US Patent for Image making medium Patent (Patent .

    The inventive image making medium typically provides a shape or a form to the image. Desirably, at least a part of an inventive image is transparent or translucent. It is typically desired that inventive images are permanent. For example, it is preferred that coloration of inventive images does not substantially change undesirably over time.

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    Our product line includes photoinitiators, nucleating agent, antioxidants, optical brighteners, UV absorbers & monomers and polymerization inhibitors. Our nucleating agents include Chemcleat NA-21, 3988, NA-11 & 3940. We offer photoinitiators such as Chemacure PI-369, 907, 2959,500 and 1173.

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    Optical brightener - Wikipedia

    Brighteners are used in many papers, especially high brightness papers, resulting in their strongly fluorescent appearance under UV illumination. Paper brightness is typically measured at 457 nm, well within the fluorescent activity range of brighteners. Paper used for banknotes does not contain optical brighteners, so a common method for .

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    Physical and chemical properties. Due to the importance of these properties on the definition of the best analytical approach for the determination of each selected migrant in foodstuffs, data were collected from different databases (Epi suite, 2000, Budavari, 2001, Lide, 1997, Properties of organic compounds, 1996) and documents like the Synoptic document (European Commission, 2003).

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    Optical Brighteners The tendency of many organic materials to yellow is due to degradation by UV or visible light. The breakdown products absorb blue light, giving a yellow appearance in daylight. Products that absorb UV light and then transmit it in the blue range can be used to counter this effect.

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    Why Brightening Chemicals Aren't in Green Detergents

    Optical brighteners are synthetic chemicals added to liquid and powder laundry detergents to make clothing appear whiter and brighter, and thus cleaner. They are the modern day replacement for the decades-old practice of bluing—adding small amounts of blue dye to fabric to make it appear whiter.

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    Optical Brightener OB, Uvitex OB, Tinopal OB, CAS 7128-64-5

    >Optical Brightener OB is used as an brightener and to offset the yellowness of a polymer and yield a whiter appearance. Mainly used as thermoplastic (PVC, PS, PE, PP, ABS) optical brightener. Also for coatings, printing inks, paints, dyes, manufactured fibers, synthetic leather, waxes, fats, and oils. Recommend indoor use only.

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    Tinopal® optical brighteners (fl uorescent whitening agents) are designed to brighten coatings or adhesives and sealants or to mask yellowing. Tinopal® can also be used where fl uorescence can provide means to detect fi lm thicknesses or for registration and identifi cation purposes. Coatings that stay looking good 5

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