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Determination of the color of petroleum products is used mainly for manufacturing control purposes and is an important quality characteristic, since color is readily observed by the user of the product. In some cases, the color may serve as an indication of the degree of refinement of the material. When the color range of a particular product is known, a variation outside the established range may indicate possible contamination with another product. However, color is not always a reliable guide to product quality and should not be used indiscriminately in product specifications.
1.1 This test method covers the visual determination of the color of a wide variety of petroleum products, such as lubricating oils, heating oils, diesel fuel oils, and petroleum waxes.
Note 18212;Test Method D 156
1.2 This test method reports results specific to the test method and recorded as x201C;ASTM Color.x201D;
1.3 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.
Lovibond色度标准色度标准介绍比色测量是通过与固定的颜色代表的一系列标准进行比较的颜色分级技术,目前广泛应用于产品的颜色评估。对于多种产品类型,一系列经典色标被用于色度控制并作为颜色规格的表达方式,长久以来,许多惯用的分级色标已经被视为行业标准并延用至今。 ...
产品介绍:赛波特色标用于色度小于ASTM 0.5精炼产品质量控制以及产品鉴定。产品范围包括有未染色车用汽油、航空汽油、喷气燃料、石脑油、煤油、白油以及石油蜡。在同一光源下将样品与标准色板进行比较。用换算表将高度换算为Saybolt色度值。选购日光照明组依据ASTM标准提供标准光源。赛波特石蜡比色计配备加热器以加热固态石蜡处于熔化状态。选配可调变压器用于调节样品温度。...
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