| 摘要 |
<p>STRUCTURAL AND SURFACE PROPERTIES TESTER FOR PAPER A method and apparatus for analyzing the structural formation and surface properties of fibrous sheet materials, particularly printing papers, are described. The method requires advancing a marker over a substantial area of the sheet to be tested. The marker is urged into contact with the sheet so that it exerts a pressure on it, typically of printing processmagnitudes. The marker is any material which produces an image the intensity of which is proportional to the pressure exerted upon it by the test sheet. A preferred marker is a graphite bar. The image produced is equivalent to those produced by Beta ray formation analyzers and may be evaluated by a missing dot technique commonly employed in rotogravure print quality evaluations.</p> |
