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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The requirements for e11664 and viewing may be interchanged. NOTE 2—With the possible exception of the measurement of unusually structured or? Care must be taken to correct for this error 3, Test Method D The spectrometer may be either a typical colorimetric spectrometer, designed speci? The element should conform to the following requirements: Please first verify your email before subscribing to alerts.
When the degree of directionality of the specimen is to be evaluated, uniplanar geometry should be used. See also Guide E and Practice E Special precautions, outlined here, must be observed to minimize the effects of these characteristics; the use of special equipment beyond the scope of this practice may be required to eliminate the effects entirely. This standard is not included in any packages.
As the voice of the U. Commonly used light sources include incandescent lamps, either operated aztm If you feel that your comments have not received a fair hearing you should make your views known to the ASTM Committee on Standards, at the address shown below. It is essential that these portions impinge on areas of the sphere wall having the same re? Need more than one copy?
Standard Practice for Obtaining Spectrometric Data for Object-Color Evaluation
Each user must decide whether the loss of accuracy in his measurements is e1146 small for the purpose for which data are obtained. While this method works? It is highly recommended that instrumental readings be corrected for? 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 same method should be used to verify the zero reading in instruments that do not require such a calibration step.
Use of shorter wavelength ranges may result in reduced accuracy. NOTE 5—When a hemispherical receiver such as an integrating sphere is used, and the specimen is placed?
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ASTM E – Standard Practice for Obtaining Spectrometric Data for Object-Color Evaluation
In such cases, verify the accuracy of the reading at the low end of the photometric scale by using a calibrated standard with re? The same restriction applies to the viewing beam. Examples of suitable veri?
Proceed to Checkout Continue Shopping. In other cases, use may be made of another white material, with assigned re?
In order to avoid implying unnecessary restrictions on instrumentation that can be used, when referencing this practice one should except in aastm cases of? This practice is general as to the materials to be characterized for color. No other units of measurement are included in this standard. Originally approved in Blocking should be carried out by replacing the specimen with an opaque object of the same size and shape as the specimen, placed in the same position. In general, spectral re?
Other standards calibrated to the perfect re? Subscription pricing is determined by: Colorimetric data are obtained by combining object spectral data with data representing a CIE standard observer and a CIE standard illuminant, as described in Practice E The important steps in the calibration of such instruments, and the material standards required for these steps, are described.
Special considerations for the interactions between an 5 instrument geometry and the specimen surface are cited in the following sections and will also apply to the formulation of product colors. The considerations involved and the procedures used to obtain precise spectrometric data are contained in this practice.