Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard. Link to Active This link will always route to the current Adtm version of the standard. Color Analysis ASTM D E E Pharmaceutical laboratory apparatus stability chambers, tablet disintegration, tablet dissolution, tablet hardness, V-blenders, Lab Equipment for Sale: This standard does not purport to address all of the safety concerns, if any, associated with its use. Users must determine whether an instrument complying with this method yields results that are useful to evaluate and characterize retroreflective specimens, or specimens having optical structures.
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This test method provides procedures for such measurement by use of a colorimeter with either a bidirectional or a hemispherical optical measuring system. A further limitation to the use of colorimeters having hemispherical geometry is the existence of a chromatic integrating-sphere error that prevents accurate measurement of color coordinates when the colorimeter is standardized by use of a white standard. Information on the required tolerances is being developed. When this requirement is not met, this test method requires the use of local standards for improving accuracy in the measurement of color coordinates see also 4.
For the measurement of small color differences between nonmetameric, nonparameric specimens, accuracy in absolute color coordinates is less important and standardization of the colorimeter by use of a white standard is satisfactory. However, accurate color-difference measurement requires that specimen pairs have similar spectral and geometric characteristics. Scope 1. This standard is also known as a product standard. The use of a product standard of suitable stability is highly desirable.
In this case, the instrument may be standardized for reflectance measurement by use of a white reflectance standard or, for transmittance measurement, with no specimen or standard at the specimen position.
Users must determine whether an instrument complying with this method yields results that are useful to evaluate and characterize retroreflective specimens, or specimens having optical structures. Measurement by using a spectrocolorimeter is covered in Practice E and methods on color measurement by spectrophotometry. 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.
AL AQIDAH AL WASITHIYAH PDF
ASTM E1347
This test method provides procedures for such measurement by use of a colorimeter with either a bidirectional or a hemispherical optical measuring system. A further limitation to the use of colorimeters having hemispherical geometry is the existence of a chromatic integrating-sphere error that prevents accurate measurement of color coordinates when the colorimeter is standardized by use of a white standard. Information on the required tolerances is being developed. When this requirement is not met, this test method requires the use of local standards for improving accuracy in the measurement of color coordinates see also 4. For the measurement of small color differences between nonmetameric, nonparameric specimens, accuracy in absolute color coordinates is less important and standardization of the colorimeter by use of a white standard is satisfactory. However, accurate color-difference measurement requires that specimen pairs have similar spectral and geometric characteristics.
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Color Analysis (ASTM E1347 with ASTM D2244)
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