ASTM D2457, ASTM D523 are used to determine the specular gloss of a material. Gloss may be an inherent or environmentally affected property of a material and helps to evaluate the visual experience of material in product and process development in end-use performance conditions.
The Specular gloss of materials is determined by using test methods ASTM D2457, ASTM D523. A surface’s capacity to reflect light like a mirror is termed Specular Gloss. It can be inherent in the material or affected by environmental factors such as weathering and surface abrasion or processes like texturing and molding. Gloss is directly related to the visual perception of objects equally important as color when the psychological impact of products on the end consumer is considered. Gloss is helpful in product and process development along with end-use performance testing. Gloss levels must be consistently achieved on products or different batches of products.
ASTM D2457, ASTM D523 test methods are used to determine specular gloss of material. A beam of light at a specified intensity and angle is projected, and the amount of reflected light at an equal and opposite angle is measured to determine gloss value. ASTM D2457, ASTM D523 standard requires that angle of reflection must be specified (20°, 60°, or 85°). Calibrated Glossmeter is set to the proper angle and checked with the standard supplied. The meter is placed on the test sample, followed by noting the reading.
Specimens with a flat surface larger than the base of Glossmeter are used (45 × 145 mm or 1.75 inch × 5.625 inch minimum) are used.
The result is given in glass units (GU)
20° Gloss (GU) 60° Gloss (GU) 85° Gloss (GU)
ASTM D2457 and ASTM D523 test methods explain the measurement of the gloss of solid plastics and plastic films and gloss on non-metallic samples.
ASTM E572 test method covers the analysis of stainless and alloy steels by Wavelength Dispersive X-ray Fluorescence Spectrometry (WDXRF). It provides rapid, multi-element determinations with sufficient accuracy to assure product quality.
The ASTM D2674 test is a standard test method for the analysis of sulfochromate etch solutions used in the surface preparation of aluminum. The ASTM D2674 standard specifies a method for determining the efficacy of an etchant used to prepare the surface of aluminum alloys for subsequent adhesive bonding.
An immunological method for quantization of Hevea Natural Rubber (HNRL) proteins using rabbit anti-HNRL serum. Rabbits immunized with HNRL proteins react to the majority of the proteins present, and their sera have the capability to detect most if not all the proteins in HNRL.
ASTM G65 measures the resistance of metallic materials to abrasion using the dry sand/rubber wheel apparatus. The quality, durability, and toughness of the sample are determined using this test. Metallic materials are ranked in their resistance to scratching abrasion under a controlled environment.
ASTM E2141 test methods provide accelerated aging and monitoring of the performance of time-dependent electrochromic devices (ECD) integrated in insulating glass units (IGU). This test helps to understand the relative serviceability of electrochromic glazings applied on ECD.
ASTM C724 test method is used in analyzing the quality and ease of maintenance of a ceramic decoration on architectural-type glass. This test method is useful in the acknowledgment of technical standards.
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