ASTM D4955-89(R2021) pdf free download

ASTM D4955-89(R2021) pdf free download.Standard Practice for Field Evaluation of Automotive Polish
1. Scope
1.1 This practice covers the evaluation of the performance properties ofautomotive polishes. This practice is applicable to products that are commonly referred to as car/auto wax, cleaner wax, polish, and the like. This practice is limited to a comparison among test polishes, with a standard polish, or both, under the conditions of the individual test. The compara- tive results are indicative of absolute performance only insofar as the test conditions are representative of all normal applica- tion and use conditions. 1.2 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 appro- priate safety, health, and environmental practices and deter- mine the applicability ofregulatory limitations prior to use. 1.3 This international standard was developed in accor- dance with internationally recognized principles on standard- ization established in the Decision on Principles for the Development of International Standards, Guides and Recom- mendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
3. Significance and Use
3.1 This practice is intended to define the range of proper- ties to be tested, the apparatus to be used, and the comparisons of automotive polish performance to be made. Since conditions, products, and apparatus vary, considerable discre- tion must exist among formulators and marketers in these areas and on what properties or performance characteristics are most significant for their products. This practice is intended to be flexible enough to honor this fact within the description of automotive polish in Section 2. 3.2 The test methods are subjective and empirical in order to conform to the basic characteristics ofthe class ofproducts and to allow flexibility in testing. This also conforms to typical consumer experience. 3.3 The practice also allows for flexibility in choice of environmental characteristics under which the durability test- ing is done. This allows discretion to be exercised by those testing the products in order to provide greatest significance for the products being tested as they are intended for various marketplace needs.
4. Apparatus and Materials
4.1 Sample ofPolish to be tested. 4.2 Sample of Control Polish—A control polish should be selected for comparison to the test polish. It should be recognized that automotive polishes are formulated to perform different functions. The control polish should be selected with a clear justification in mind, such as, test and control polish should be designed for same function (high durability, ease of application, or other performance features). These factors should be taken into account when interpreting results and choosing the control polish. All results are reported with the clearly identified control comparison. 4.3 Test Substrate—Since this test is designed to test auto- motive polish performance under natural and normally occur- ring environmental conditions, the substrate chosen shall be one for which the test polish was intended on a vehicle which can be subjected to the chosen environmental conditions in a manner meeting these criteria. The test surface shall be in good physical condition, not badly cracked, scratched, or otherwise damaged so as to interfere with evaluation of polish properties. The test surface for each sample is intended to be one half of the surface area ofthe vehicle to be polished. In no case should the area polished for each product be less than 1290 cm 2 (200 in. 2 ). The surface is divided as described later in the method. (Procedures evaluating more than two polishes per vehicle may be done as a screening technique; however, results are not sufficiently reproducible to be covered by this method.) N OTE 1—New vehicle paints (paints with service life less than one year) give properties such as, water beading and high gloss, very similar to those being evaluated for the polish. Therefore, evaluation of appearance and durability due to the polish formulation are minimized.