Knowledge Base
What is gloss in paper and board?
Gloss is a measure of how much light a paper or board surface reflects in the specular, or mirror, direction. A high-gloss sheet reflects light sharply and looks shiny. A matte sheet scatters light and looks dull. In the paper and board industry, gloss is a controlled optical property because it shapes how printed packaging, labels, and publication papers appear on the shelf and in the hand.
Paper gloss is measured at a 75 degree angle, in line with TAPPI T480 and ISO 8254-1. A glossmeter directs light onto the surface at 75 degrees from the vertical and measures the light reflected at the equal and opposite angle. The result is reported as a percentage of light reflected, on a scale of 0 to 100, measured against a black reflective tile used for calibration. The tile is assigned its value by our Level 3 lab in New Albany, IN.
For quality, R&D, and operations experts, consistent gloss is part of protecting product and brand integrity. It confirms that coating, calendering, and printing processes are under control, and that a coated or cast-coated grade meets the appearance specification the customer signed off.
Industrial Physics supplies paper gloss measurement through its Technidyne brand. The Technidyne TEST/Plus Gloss is a dedicated single-property 75 degree instrument, while the PROFILE/Plus Gloss module adds fully automated top and bottom measurement across the sheet. Both measure to TAPPI T480 and ISO 8254-1, supported by traceable calibration standards.
Gloss is one of several optical properties, alongside brightness and opacity, that together define the visual quality of paper and board.
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Related Products
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Technidyne TEST/Plus® Gloss
The TEST/Plus® Gloss is designed for accurate gloss testing of paper, cardboard, corrugated, inks and coatings, paper, paperboard and tissue in seconds. CE certified for European safety standards (75° angle version only).
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Technidyne Paper Calibration Standards for TEST/Plus® Gloss
Ensure accurate 75° gloss testing of paper-based products and maintain the performance of your Technidyne Test/Plus® Gloss 75 Degree instrument with our dedicated gloss calibration standards.
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Technidyne PROFILE/Plus® Gloss 75 Degree
Automated Gloss 75 degree measurement accordance with TAPPI T480 and ISO 8254-1. Fully-automated measurement of top and/or bottom gloss. Includes paper feed for automated profile testing.
FAQs
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Paper and board gloss is measured at 75 degrees from the vertical, in line with TAPPI T480 and ISO 8254-1. The shallow angle spreads the reading across the surface, which makes it more sensitive and repeatable on low to medium gloss materials like paper.
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The TEST/Plus Gloss is a dedicated single-property instrument for a QC station. The PROFILE/Plus Gloss module is fully automated, measures top and bottom sides and MD and CD at once, and runs on a modular platform alongside other optical modules.
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Follow a regular calibration schedule using matched reference standards. Technidyne paper gloss calibration standards are certified traceable to master standards described in TAPPI T480, so routine calibration keeps readings consistent between cycles and comparable across sites.
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Paper is not identical on both faces or in both directions. The top and bottom (felt and wire) sides can differ, and gloss can vary along and across the sheet. Measuring both sides and both directions reveals coating or calendering variation that a single reading would miss.
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Coated and cast-coated papers and boards, light-weight coated publication grades, labels, and printed packaging all rely on gloss control, because appearance is part of the specification. Uncoated grades are measured too, usually where a matte or controlled finish must stay consistent.
Related Articles
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Gloss is the visual perception of shininess, and it comes from the way a surface reflects light. When light hits a very smooth surface, most of it reflects in a single direction, the specular direction, and the surface looks glossy. When the surface is rough or open, light scatters in many directions and the surface…
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Key terms Term Definition Gloss The degree to which a surface reflects light in the specular (mirror) direction. Higher gloss means a shinier surface. Specular reflection Light reflected at the equal and opposite angle to the incident light, as from a mirror. 75 degree geometry The measurement angle used for paper and board gloss, taken…
