Find the most up-to-date version of ASTM E at Engineering ASTM E() E1 Standard Practice for Obtaining Spectrometric Data for Object-Color Evaluation [ASTM International] on *FREE*. ASTM E Standard Practice for Obtaining Spectrometric Data for Object- Color Evaluation. This practice covers the instrumental measurement.
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If the black-cavity traps light by utilizing asymmetric or off-axis black optics then a preferred orientation of the cavity relative to the optical axis should be identi? Your comments are invited either for revision of this standard or for additional standards and should be addressed to ASTM International Headquarters. If a white re? No other units of measurement are included in this standard.
ASTM E – Standard Practice for Obtaining Spectrometric Data for Object-Color Evaluation
Some national laboratories will accept user supplied white material standards and supply a calibration of the re? Users of this standard are expressly asm that determination of the validity of any such patent rights, and the risk of infringement of such rights, are entirely their own responsibility. On asfm scale, the smallest color difference that can be reliably observed is of the order of 0. The requirements for illuminating and viewing may be interchanged. The same method should be used to verify the zero reading in instruments that do not require such a calibration step.
This practice is general as to the materials to be characterized for color. Examples of suitable veri? If the document is revised or amended, you will be notified by email.
Standards Subsctiption may be the perfect solution. NOTE 2—With the possible exception of the measurement of unusually structured or? While this method works?
Standard Practice for Obtaining Spectrometric Data for Object-Color Evaluation
In order to avoid implying unnecessary restrictions on instrumentation that can be used, when referencing this practice one should except in those cases of? Each user must decide whether the loss of accuracy in his measurements is negligibly small for the purpose for which data are obtained. Commonly used light sources include incandescent lamps, either operated without? It exceeds unity if the system is aetm that the specimen causes more light to reach the receiver than would in its absence.
ASTM E Calibration Services: spectro slide sphere gloss testing certification
Proceed to Checkout Continue Shopping. The geometric arrangement of the viewing beam may be the same as that of the illuminating beam, or may differ, for example, by the use of a hemispherical receiver such as an integrating sphere. The spectrometer may be either a typical colorimetric spectrometer, designed speci? See Practice E When the degree of directionality of the specimen is to be evaluated, uniplanar geometry should be used.
However, for the measurement of? This step does not apply to spectrocolorimeters. Considerations required when measuring? As the voice of the U.
Keeping the surface clean is essential as errors in apparent re?
However, the use of a wider interval can lead to signi? If the instrument requires calibration with a Grey tile to evaluate the single-beam integrating-sphere photometric nonlinearity, the linearity veri?
You may delete a document from your Alert Profile at any time. The preferred geometry will be the one that minimizes the surface effects, thereby optimizing the separation. A number in parentheses indicates the year of last reapproval. When the specimen does not exhibit directionality, any of the bi-directional geometries may be used.