ISO 8791-3 Paper and Cardboard - Roughness-Smoothness Determination (Air Leak Methods) - Part 3: Sheffield Method

EUROLAB, with its state-of-the-art accredited laboratories and expert team, provides precise and fast testing services within the scope of ISO 8791-3 testing. ISO 8791-3 specifies a method for determining the roughness of paper and board using the Sheffield apparatus.

ISO 8791-3 is applicable to paper and board with Sheffield roughness values ​​between 10 ml/min and approximately 3000 ml/min. Not suitable for soft papers that allow the edges of the test head to indent the surface, or high air permeability papers that allow significant airflow through the sheet, or papers that will not lie flat during testing.

This part of ISO 8791 describes one of several methods for determining the roughness of paper and board with an air leak method. Because these methods are based on different geometric designs and use different air pressures and subject the test piece to different compression pressures, they give different numerical results. General requirements for such tests are described in ISO 8791-1.

A test piece is clamped between a flat plate and two flat concentric circular areas. Air is supplied at a certain pressure to the space between the two soils and the air flow rate between the soils and the test piece is measured. Airflow rate is a measure of the roughness of the test piece.

EUROLAB assists manufacturers with ISO 8791-3 test compliance. Our test experts, with their professional working mission and principles, provide you, our manufacturers and suppliers, the best service and controlled testing process in our laboratories. Thanks to these services, businesses receive more effective, high-performance and quality testing services and provide safe, fast and uninterrupted service to their customers.