ISO 8254-3:2016

Name: ISO 8254-3:2016 — Paper and board — Measurement of specular gloss — Part 3: 20 degree gloss with a converging beam, TAPPI method
SKU: ISO 8254-3:2016
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Paper and board — Measurement of specular gloss — Part 3: 20 degree gloss with a converging beam, TAPPI method

Название (английский):

ISO 8254-3:2016

Paper and board — Measurement of specular gloss — Part 3: 20 degree gloss with a converging beam, TAPPI method

Статус документа:: Действующий
Формат:: Электронный (PDF)
Количество страниц:: 10
Дата публикации:: 6 апреля 2016 г.
Издание:: ISO IS 8254 edition 2 version 1
ICS:: 85.060

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Описание (английский):

ISO 8254-3:2016 specifies a method for measuring the specular gloss of paper and board at an angle of 20° to the normal to the paper surface. It is applicable chiefly to highly glossy surfaces, such as cast-coated, lacquered, highly varnished or waxed papers and high-gloss ink films. NOTE This part of ISO 8254 has been developed from TAPPI T653[2], ISO 2813[1] and from ISO 8254‑1.

Abstract

Похожие стандарты

Стандарты, упомянутые в описании

Overview

ISO 8254-3:2016 - Paper and board: Measurement of specular gloss - Part 3: 20° gloss with a converging beam (TAPPI method) - specifies a standardized method to assess the specular gloss of paper and board at an incidence/reflection angle of 20°. It is intended chiefly for high‑gloss surfaces (cast‑coated, lacquered, highly varnished or waxed papers and high‑gloss ink films). The measurement uses a converging beam geometry (TAPPI method) and references a polished black‑glass standard with refractive index 1.540.

Key topics and technical requirements

Measurement geometry: Light incident at 20° to the surface normal; reflected light detected within a defined aperture using a photodetector.

Apparatus: Gloss meter with a converging lens system, light source, photodetector, matte-black light‑tight housing, and means to hold samples flat.

Gloss standards:

Primary/high‑gloss reference (black glass, n = 1.540) defines the scale.
Intermediate and working standards calibrated against the high‑gloss reference.
Zero‑gloss standard (black velvet cavity) for zeroing.

Calibration: Zero check (source off/on), warm‑up, adjust to high‑gloss reference value, verify with intermediate standards; re‑check working standard regularly during runs.

Sampling & conditioning: Test pieces representative of the lot (ISO 186 for sampling); condition samples at 23 °C and 50% RH per ISO 187. Avoid moisture exposure (>65% RH can reduce gloss).

Procedure: Minimum of five test pieces (ten if both sides measured); record gloss in machine/cross directions and repeat measurements to obtain mean values.

Documentation & precision: Instrument optical specifications (Annex A) and precision data (Annex B) are included; test report requirements defined.

Applications and users

ISO 8254-3:2016 is used to:

Control quality in paper and board manufacturing for high‑gloss products.

Verify finish in printing, coating and converting (varnish, lacquer, film inks).

Provide acceptance criteria in specifications and lab testing for suppliers and purchasers. Typical users:

Quality engineers and laboratory technicians in paper mills and converters

Packaging and label manufacturers

Print quality control teams

Instrument manufacturers and calibration laboratories

Related standards

ISO 8254-1 and ISO 8254-2 (other gloss angles/methods)

ISO 2813 and TAPPI T653 (origin of the TAPPI method)

ISO 186 (sampling) and ISO 187 (conditioning)

Note: Commercial 20° gloss meters for paints/plastics may use different reference refractive index (e.g., 1.567) and are not directly compatible with ISO 8254-3:2016 readings.

Practical keywords: ISO 8254-3:2016, 20° gloss, specular gloss measurement, TAPPI method, gloss meter calibration, paper and board gloss.

ISO 8254-3:2016

Abstract

Похожие стандарты

Overview

Key topics and technical requirements

Applications and users

Related standards

Технические детали

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ISO 8254-1:2009

Paper and board — Measurement of specular gloss — Part 1: 75 degree gloss with a converging beam, TAPPI method

ISO 8254-2:2016

Paper and board — Measurement of specular gloss — Part 2: 75 degree gloss with a parallel beam, DIN method

BS EN ISO 2813:2014

Paints and varnishes. Determination of gloss value at 20 degrees, 60 degrees and 85 degrees.