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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E — 09a 7. 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. The information reported here re? The presence of surface contaminants will critically affect the reliability of this standard.
The values and procedures for computing CIE tristimulus values from spectrometric data are contained in Practice E 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.
This practice is general as to the materials to be characterized for color. Care must also be taken to avoid discoloring of either area due to prolonged asm or dirt, or partial translucency due to insufficient thickness of the coating. In these cases, it may be more appropriate to use larger cone angles, with appropriate tolerances.
The preferred geometry will f1164 the one that minimizes the surface effects, thereby optimizing the separation. ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentioned in this standard. The detector must be stable with time and have adequate responsivity over the wavelength range used. As the voice of the U.
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. Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend.
The results of diffuse measurements made on specimens having broad regular-transmittance factor peaks will depend importantly on the size of the re? Thus there is only one mode of measurement possible for the d: It is essential that these portions impinge on areas of the sphere wall having the same re?
In such cases, it is recommended 5 to use the substitution method of measurement rather than the comparison method 3. Details of the size, shape, and re?
Geometric notations may be found in Practice E This step does not apply to spectrocolorimeters. Commonly used light sources include incandescent lamps, either operated without?
ASTM E – Standard Practice for Obtaining Spectrometric Data for Object-Color Evaluation
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 In general, spectral re? It is highly recommended that instrumental readings be corrected for? Other standards calibrated to the perfect re? The important steps in the calibration of such instruments, and the material standards required for these steps, are described.
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This standard is subject to revision at any time by the responsible technical committee and must be reviewed every?
Standard Practice for Obtaining Spectrometric Data for Object-Color Evaluation
Exceptions to this applicability are noted. For example, the value of the re?
Standards Subscriptions from ANSI provides a money-saving, multi-user solution for accessing standards. The condition of the specimens before and after measurement should be noted and reported. Summary of Practice 4.