ASTM E284 is a standard terminology that defines terms used to describe appearance, such as color, gloss, opacity, scattering, texture, and visibility of materials (ordinary, fluorescent, retroreflective) and light sources (including visual display units). Committees other than Committee E12 on Color and Appearance are encouraged to use this terminology standard, which contains definitions of appearance terms that apply to the work of many other ASTM technical committees. The standard includes important terms and definitions explicit to the scope, whether or not the terms are currently used in an ASTM standard.
Get Certified ASTM E284 for Reliable Appearance Terminology Compliance
Consistent terminology directly impacts communication and accuracy in appearance measurement testing. ASTM E284 includes definitions for appearance-related terms that help technical committees, laboratories, and manufacturers use the same language. This terminology supports correct specification, testing, and reporting of appearance properties. This standard provides help to industries to ensure that color, gloss, and other appearance-related applications are maintained to standard and within specification.
What is the Scope of ASTM E284?
ASTM E284 specifies definitions for appearance characteristics of materials and light sources such as color, gloss, opacity, scattering, texture, and visibility. Many ASTM technical committees employ the standard, and it is recommended for use in standards outside of Committee E12.
Material type: This is for all materials and light sources described based on appearance, such as ordinary, fluorescent, and retroreflective materials, and not just for one type of material.
Purpose: ASTM E284 offers definitions of terms used for appearance that are essential for communicating within each of the ASTM technical committees and standards.
Terms covered: The following terms are defined: color, gloss, opacity, scattering, texture, visibility, and other appearance characteristics.
Method: The method is a collection of definitions, along with superscript letters that show the correspondence between the definitions and other ASTM definitions or acronyms from other organizations, and the suggested use of symbols or acronyms, where appropriate.
Result: The standard offers an extensive source of appearance terminology for standards development, testing, and specification.
Test Limitations: Terms that are commonly used and found in common-language dictionaries are typically not included unless there are multiple definitions in the dictionary.
Environmental conditions: The term applies to all environmental conditions important in terms of appearance measurement and observation.
Applications: Engineers, scientists, and standards developers use ASTM E284 to communicate accurately in color measurement, gloss evaluation, opacity assessment, and other applications involving material appearance.
What are the Uses of ASTM E284?
The ASTM E284 standard establishes appearance-related terminology for use in ASTM technical committees and industry. This standard supports accurate specification, testing, and reporting of appearance properties.
This standard-
Harmonizing the definition of terms related to color, gloss, opacity, etc.
Developing training programs for those working within ASTM committees and standards
Developing reference definitions for test methods and specifications.
Matching definitions provided in other ASTM standards and other organizations
Suggesting symbols and acronyms for quantities relating to appearances
Assisting in the production of quality products and conforming to specifications in the appearance industry.
Which materials are covered under ASTM E284?
ASTM E284 is a terminology standard that applies to all materials and light sources whose appearance is described, such as ordinary materials, fluorescent materials, retroreflective materials, and visual display units. The standard applies to the accurate communication of the appearance characteristics of any material for which they are measured, specified, or reported.
Why is ASTM E284 Important?
ASTM E284 establishes a common standard of appearance terminology to support consistent communication among ASTM technical committees and within industry. Appearance-related terms vary widely, and in some instances, different disciplines used the same term differently. This standard deals with this variation by recommending definitions for E12 standards. The terminology standard uses certain word endings: “ion” is used for a process, “ance” for a property of a specimen, and “ity” for a property of a kind of material. This precision ensures proper technical communication and helps to avoid ambiguity in appearance-related specifications and test methods.
ASTM E284 Terminology Reference Guide
ASTM E284 provides standardized terminology for describing the appearance of materials and objects. The terminology covers major appearance characteristics, including surface appearance, color and colorimetry, reflection, illumination and viewing conditions, and observer-related visual concepts. These definitions provide a consistent technical basis for describing and communicating appearance characteristics in scientific and industrial applications.
Appearance and Surface Characteristics
ASTM E284 provides terminology for gloss, opacity, scattering, texture, haze, visibility, and other characteristics used to describe the appearance of materials and objects.
Color and Colorimetry
Analysts define and communicate color-related concepts such as hue, lightness, chromaticity, color difference, and related colorimetric terms to describe and compare color appearance.
Reflection, Illumination, and Viewing
Observers describe reflection, illumination, viewing direction, observation, and related geometric relationships to provide consistent terminology for describing appearance under specified viewing conditions.
Observers and Visual Perception
Includes terminology associated with visual observation and standardized observer/colorimetric concepts used to relate appearance descriptions to human visual response.
Testing Procedures and Requirements for ASTM E284
ASTM E284 is a terminology standard that provides definitions and guidelines for terms related to appearance. Other referenced ASTM documents include E12, E179, E284, E308, E430, E808, and E1345.
ASTM Committee E12 on Color and Appearance identifies important terms and definitions specific to the scope of appearance description
Definition Development
The committee develops definitions for appearance-related terms including color, gloss, opacity, scattering, texture, and visibility
Correspondence Indication
The standard indicates correspondence with definitions from other ASTM standards and organizations using superscript letters A, B, or C
Symbol Recommendation
Where appropriate, ASTM E284 lists recommended symbols or acronyms for appearance terms
Revision Tracking
The standard includes parenthetical information giving the revision in which each definition was added or last revised
ASTM E284 Testing Process and Data Collection
ASTM Committee E12 on Color and Appearance maintains and updates the standard to include important terms and definitions that are specific to appearance description. The committee identifies standards to which it may correspond at the end of definitions for using the standard designation in parentheses. Other organizations may use the same acronym to define the same term, and sometimes include the year the organization used the term in parentheses. The superscript letters A, B, and C denote the level of correspondence: A – identical definitions, B – modifications with little difference in basic meaning, C – significant differences. The standard uses specific word endings to differentiate between processes, properties of specimens, and properties of materials.
ASTM E284 Standard Terminology of Appearance Reference Document
Common Challenges and Troubleshooting in ASTM E284
To use ASTM E284 terminology consistently, you need to understand how the term “appearance” varies across fields. The standard includes the following remarks: Terms referring to appearance vary significantly, and usage varies across fields. The most typical problem is that definitions do not correspond to other definitions in other committees and standards, and that the superscript letter system (to show the correspondence between definitions) is not understood. Laboratories and standards developers ensure consistency by using definitions defined in ASTM E284 and by using the recommended symbols and acronyms defined in the standard.
ASTM E284 Analysis Results and Interpretation
ASTM E284 gives definitions and terms relating to appearance. The standard is not a test method with numerical results; it is only a reference document.
The standard clarifies terms used to describe the appearance, such as color, gloss, opacity, scattering, texture, and visibility of materials and light sources.
ASTM E284 provides correspondence with definitions from other ASTM Standards in standard designations shown at the end of the definitions.
The standard shows correspondence to other definitions in the same standard, sometimes with the date of the terminology standard, for using the organization acronyms.
The superscript letters A, B, and C represent the degree of correspondence: A = identical, B = modification with little difference in essential meaning, and C = substantial difference.
The standard recommends symbols and acronyms for appearance terms, and these are recommendations, not requirements.
Technical committees and standardizers rely on standardized terminology for appearance-related specifications and test methods in ASTM E284 to ensure consistent communication.
ASTM E284 covers definitions associated with the appearance property of light sources and materials—such as ordinary, fluorescent, and retroreflective materials—that are related to color, gloss, opacity, scattering, texture, and visibility.
What is the relationship of ASTM E284 to other definitions?
ASTM E284 lists correspondences with other ASTM standards at the end of definitions. For other organizations, it is in parentheses, sometimes with the date also. Superscript letters A, B, or C indicate the degree of correspondence.
Are all appearance-related terms covered in ASTM E284?
No. Common words, words used in common language dictionaries, are not included unless dictionaries list multiple definitions, and it appears desirable to specify the definitions recommended for E12 standards.
ASTM E284 uses which type of word endings for terminology?
ASTM E284 uses certain word endings: ion signifies a process (reflection); ance signifies a property of a specimen (reflectance); and ity signifies a property of the kind of material (reflectivity).
Davis Scott is an Electrical and Electronics Engineer specializing in multidisciplinary validation, quality assurance, and comprehensive electro-mechanical testing. Know More
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