EN ISO 8254-1:2009 PDF

Name: EN ISO 8254-1:2009 — Paper and board - Measurement of specular gloss - Part 1: 75 degree gloss with a converging beam, TAPPI method (ISO 8254-1:2009)
SKU: EN ISO 8254-1:2009
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Paper and board - Measurement of specular gloss - Part 1: 75 degree gloss with a converging beam, TAPPI method (ISO 8254-1:2009)

Название (английский):

EN ISO 8254-1:2009

Paper and board - Measurement of specular gloss - Part 1: 75 degree gloss with a converging beam, TAPPI method (ISO 8254-1:2009)

Статус документа:: Действующий
Формат:: Электронный (PDF)
Количество страниц:: 18
Дата публикации:: 15 февраля 2009 г.
Издание:: CEN EN 8254 edition 2 version 1
ICS:: 85.060

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Описание (английский):

ISO 8254-1:2009 specifies a method for measuring the specular gloss of paper at an angle of 75° to the normal to the paper surface. Although its chief application is to coated papers, it may also be used for glossy uncoated papers such as supercalendered papers.

Abstract

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Стандарты, упомянутые в описании

Overview

EN ISO 8254-1:2009 - "Paper and board - Measurement of specular gloss - Part 1: 75° gloss with a converging beam, TAPPI method" is a CEN-adopted ISO method for quantifying the specular gloss of paper and board measured at a 75° angle using a converging-beam (TAPPI) geometry. Its primary application is to coated papers, but it is also suitable for glossy uncoated grades (for example, supercalendered papers). The standard defines the measurement principle, required apparatus, calibration procedures, sampling and conditioning, test procedure, precision and reporting.

Key topics and requirements

Measurement geometry: Specular gloss measured at an incidence/reflection angle of 75° to the surface normal using a converging beam (TAPPI method).

Scope limits: Not intended for assessing image-reflecting quality or extremely high-gloss surfaces such as cast-coated, highly varnished, lacquered or waxed papers - other angles (e.g., 20°) may be more appropriate.

Apparatus essentials (Clause 5):

Gloss meter/reflectometer with optical layout per Annex A.
Light source and lens to produce a converging beam.
Photodetector and a defined aperture to collect specular reflection.
Test-piece holding device (e.g., suction plate) and a light-tight, matt-black housing.

Standards and calibration:

Primary specular reference: theoretical perfect mirror = 384.4 gloss units; a polished black glass with refractive index 1.540 at 587.56 nm acts as the 100 gloss unit reference on this scale.
Calculation of high-gloss reference values can be derived from the glass refractive index (reference wavelength set to helium d line 587.56 nm).

Measurement output: A specular gloss value-a dimensionless reflectometer value proportional to the luminous flux reflected into the defined aperture and scaled relative to the reference standard.

Supporting procedures: Sampling (ISO 186), conditioning and atmosphere (ISO 187), calibration, precision assessment and requirements for test reporting.

Applications and users

Quality control and QA in paper and board manufacturing

Coating and finishing process control for coated paper producers

Printing and converting operations monitoring surface gloss for print appearance

Lab and instrument manufacturers validating and calibrating gloss meters

R&D teams assessing formulation or process changes that affect surface gloss

Keywords naturally relevant for SEO: EN ISO 8254-1:2009, specular gloss, 75° gloss, TAPPI method, gloss meter, paper and board, coated papers, supercalendered paper, gloss calibration.

EN ISO 8254-1:2009 PDF

Abstract

Похожие стандарты

Overview

Key topics and requirements

Applications and users

Related standards

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