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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Individual reprints single or multiple copies of this standard may be obtained by contacting ASTM at the above address or at phonefaxor service astm. 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. When the specimens do not have these desired characteristics, departures should be noted. Care must be taken to correct for this error 3, Test Method Qstm It exceeds unity if the system is such that the specimen causes more light to reach the receiver than would in its absence.
Use e1146 shorter wavelength ranges may result in reduced accuracy. You can download and open this file to your own computer but DRM prevents opening this file on another computer, including a networked server.
While this method works? The following paragraphs incorporate such a statement. When the regularly transmitted beam is excluded, for example by the use of a light trap, the condition is designated 0: NOTE 6—For all the conditions described in 8. Whenever the cavity is employed it should e164 be presented to the instrument in the indicated orientation. The values and procedures for computing CIE tristimulus values from spectrometric data are contained in Practice E xstm Special considerations for aztm interactions between an 5 instrument geometry and the specimen surface e1164 cited in xstm following sections and will also apply to the formulation of product colors.
In order to avoid implying unnecessary restrictions on instrumentation that can be used, when referencing this practice one should except in those cases of? 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. NOTE 4—Corrections for errors in the use of integrating spheres for the 8.
Errors in the apparent re? Asgm to this applicability are noted. Standardization and Material Standards 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 Need more than one copy?
The angles at which these readings occur should be noted in reference to the orientation of the specimen.
You may delete a document from your Alert Profile at any time. Care must also be taken to avoid discoloring of either area due to prolonged radiation or dirt, or partial translucency due to insufficient thickness of the coating.
ASTM E – Standard Practice for Obtaining Spectrometric Data for Object-Color Evaluation
This standard is not included in any packages. The same method should be used to verify the zero reading in instruments that do not require such a calibration step.
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? Current edition approved June 1, The use of pseudomonochromatic sources is not currently recommended by Subcommittee 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.
ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentioned in this standard. However, the use of a wider interval can lead to signi? Your Alert Profile lists the documents that will be monitored. The condition of the specimens before and after measurement should be noted and reported.
Some national laboratories will accept user supplied white material standards and supply a calibration of the re? Commonly used light sources include incandescent lamps, either operated without? When information on directionality is not required, the several measurements may be averaged.
Already Subscribed to this document. No other units of measurement are included in this standard.
Standard Practice for Obtaining Spectrometric Data for Object-Color Evaluation
Exceptions to this applicability are noted. This practice is general as to the materials to be characterized for color. Care should be taken not to touch the area to be measured except for application of a suitable cleaning procedure. NOTE 1—Accuracy is here de?
Considerations regarding the selection of appropriate illuminating and viewing geometries are contained in Guide E Td and the diffuse transmittance Td is obtained. See also Guide E and Practice E The detector may be a photoelectric device phototube or photomultipliera e1146 photodiode or diode array, or another suitable photodetector.
Detailed descriptions of these geometries can be found in the appropriate sections of Practice E The detector must be stable with time and have adequate responsivity over the wavelength range used. In other cases, use may be made of another white material, with asym re? The preferred geometry will be the one that minimizes the surface effects, thereby optimizing the separation.