ASTM Color Scale. ASTM Color as specified in ASTM D is a single number colour scale for grading petroleum products. The scale is defined by. 16 glass. The visual Saybolt and ASTM D Color scales can be used individually or in tandem to rank low and high chroma petroleum-based. ASTM D is a single number, one dimensional, colour scale ranging from a pale straw through to a deep red in sixteen steps ( – units in increments of .
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Samples too dark for direct viewing are diluted with kerosine. Rotate the discs by turning dials on the front of the comparator until the sample color matches the color standards and take the reading directly from the dials. However, color is not always a reliable guide to product quality and should not be used indiscriminately in product specifications. Right-click to open the PDF in a new window or download it: Koehler K Saybolt Colorimeter.
See detailed specifications Available accessories Request a quotation More products in this subcategory. Type text as it appears:: The following link provides additional information from the instruction manual or original manufacturer’s brochure. When the color range of a particular product is known, a variation outside the established range may indicate possible contamination with another product. The aetm filters are mounted in two discs, one with full value standards and the other with intermediate value standards, giving improved discrimination over single disc comparators.
What are your specifications? Methods of test for petroleum and its products.
Two-disc configuration offers a distinct advantage over single-disc systems – the sample is always bracketed between the next lower and higher color standards allowing the viewer to easily determine the actual sample color. Historical Version s – view previous versions of standard.
View the sample from either a standing or sitting position through a prism eyepiece that brings the standards and sample together in a three-field comparison. Supplied with a Certificate of Colour Conformity. Enter product name astk, make or model.
The three wstm field-of-view optical system allows a sample and two reference standard colour filters to be viewed simultaneously, allowing easy comparison of colour.
ICS Number Code It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.
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A detachable prism light shield may be inserted to eliminate any outside light interference. Link to Active This link will qstm route to the current Active version of the standard. What are your requirements. Lab Equipment for Sale: Determination of colour ASTM scale. What is your application?
Request a Free Quote Right Now. Samples which are not clear such as petroleum waxes are pre-heated above their cloud point.
The discs and sample are illuminated by a tungsten quartz halogen light source colour corrected to CIE standard illuminant C. Work Item s – proposed revisions of this standard.
Copyright Stanhope—Seta Limited Color corrected filtered halogen light source corresponding to Illuminant C of the CIE system provides clear visibility, assuring accurate readings. Supplied with; 2 x filter discs 3 x sample containers Power supply unit Instruction manual.