Bleaching of wood pulp is the chemical processing carried out on various types of wood pulp to decrease the color of the pulp paper brightness. Brightness and whiteness are two paper properties that are constantly confused by designers and others in the creative community they are not the same brightness. Understanding paper brightness introduction brightness quantifies the percentage of blue light reflected from the surface of paper as measured at a specific. When measuring brightness, a light source is directed at the paper in question, and the amount of blue light reflected off the surface is recorded. Choosing the right paper for your book can be confusing understanding these basic characteristics of paper makes the process easier.
Department information printing & reprographics 900 university ave printing modular building tel: (951) 827-4443 fax: (951) 827-3686 e-mail: [email protected] For most printers and print buyers, the terms brightness and whiteness are interchangeable however, when describing the characteristics of paper there are. Technidyne paper testing instruments for the measurement of paper brightness. Paper brightness is a gauge of how well the lignin component of paer has been removed from the paper pulp papers with large amounts of residual lignin will have.
Understanding the paper brightness scale is important for your printables learn the subtle differences between 94 and 98 brightness and more. Brightness xerox – demystifying three key paper properties 3 brightness defining brightness in lay terms, brightness is a measurement, on a scale of zero to 100, of the. Paper brightness meter (pn-48b) till now, our testers have been exported to many countries, such as italy, spain, macedonia, hungary, south korea, singapore, hongkong. Explanation of cie whiteness, tappi brightness and cie lab shade use in defining paper characteristics inculding measurement and the use of optical brightening agents.
Title: tappi brightness author: hunterlab subject: describes the tappi brightness index keywords: reflectance, paper, t452, d25a created date: 6/4/2008 11:45:06 am. The tappi t 452 brightness test is used for the determination of the brightness of white, near-white, and naturally colored pulp, paper, and paperboard. Brightness in paper industry brightness testing, is the reflectance of blue light (a specific spectral distribution with a principal wavelength of 457 nm. We measure tappi (or ge) brightness using either a technidyne s-4 brightmeter, or a technidyne s-5 brightmeter both of which measure brightness in accordance with.
Paper category product code weight brightness page hp inkjet paper inp202070 24 lb 92 4 hp color inkjet paper hpk115 hpk400 24 lb 96 4 hp bright. Paper grades paper may be defined in terms of its use in today’s market, most grades exceed the brightness range specified in the category. Save on 98 brightness copy paper with the unv91200 bulk copy paper case 5,000 sheets of paper at discount wholesale price next-day delivery. Paper brightness affects the quality and appearance of the printed page, especially photos brightness and whiteness are two different values. What kind of copy paper is suited for your business proposal or presentation what paper should you use for your inkjet printer is environmentally friendly paper an.