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Description of ASTM-D344 2011ASTM D344 - 11Standard Test Method for Relative Hiding Power of Paints by the Visual Evaluation of BrushoutsActive Standard ASTM D344 | Developed by Subcommittee: D01.26 Book of Standards Volume: 06.01 ASTM D344Significance and Use This test method evaluates the hiding power of a test paint relative to a comparison paint. The results have significance only within that relationship. It may be used for production control or quality comparisons. When a paint is applied by brush or any other practical method, the opacity of the film is affected by variations in film thickness related to the application procedure and to the application characteristics of the paint. Two paints that hide equally well by this method might therefore differ considerably when applied with a doctor blade, since the latter method gives essentially perfect leveling. Different brushes or surface application conditions can likewise give different results. Note 1Test Method D2805 describes an instrumental method for quantitatively determining hiding power without reference to a material paint standard. The paint film is applied at a uniform thickness (for example, with a doctor blade), the film thickness is measured rigorously, and the opacity is evaluated photometrically. Hiding power is thereby determined with a high degree of precision. Test Method D344 is less precise than Test Method D2805 , but is more practical because it is responsive to the application characteristics of paints, and is simpler in concept and execution. 1. Scope 1.1 This test method provides for the qualitative and quantitative visual determination of the hiding power of a test paint relative to that of a comparison paint. 1.2 This test method describes only a brushout application procedure in specific detail, but its concepts are valid for other methods of application as well. 1.3 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. 1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
ASTM Standards D16 Terminology for Paint, Related Coatings, Materials, and Applications D1475 Test Method For Density of Liquid Coatings, Inks, and Related Products D1729 Practice for Visual Appraisal of Colors and Color Differences of Diffusely-Illuminated Opaque Materials D2805 Test Method for Hiding Power of Paints by Reflectometry D5068 Practice for Preparation of Paint Brushes for Evaluation E1247 Practice for Detecting Fluorescence in Object-Color Specimens by Spectrophotometry E1347 Test Method for Color and Color-Difference Measurement by Tristimulus Colorimetry E1349 Test Method for Reflectance Factor and Color by Spectrophotometry Using Bidirectional (45:0 or 0:45) Geometry Keywords hiding power; opacity ; relative hiding; Appearance of materials; Hiding power--paints/coatings; Latex paints ; ICS Code ICS Number Code 87.040 (Paints and varnishes) DOI: 10.1520/D0344-11 ASTM International is a member of CrossRef. ASTM D344The following editions for this book are also available...This book also exists in the following packages...Subscription InformationMADCAD.com ASTM Standards subscriptions are annual and access is unlimited concurrency based (number of people that can access the subscription at any given time) from single office location. For pricing on multiple office location ASTM Standards Subscriptions, please contact us at info@madcad.com or +1 800.798.9296.
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About ASTMASTM International, formerly known as the American Society for Testing and Materials (ASTM), is a globally recognized leader in the development and delivery of international voluntary consensus standards. Today, some 12,000 ASTM standards are used around the world to improve product quality, enhance safety, facilitate market access and trade, and build consumer confidence. ASTM’s leadership in international standards development is driven by the contributions of its members: more than 30,000 of the world’s top technical experts and business professionals representing 150 countries. Working in an open and transparent process and using ASTM’s advanced electronic infrastructure, ASTM members deliver the test methods, specifications, guides, and practices that support industries and governments worldwide. |
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