ASTM C162-05(2015)
(Terminology)Standard Terminology of Glass and Glass Products
Standard Terminology of<brk type="line"/> Glass and Glass Products
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This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation: C162 − 05 (Reapproved 2015)
Standard Terminology of
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Glass and Glass Products
This standard is issued under the fixed designation C162; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
587.6 nm and n and n are the refractive indices for the
1. Scope
F C
hydrogen lines at 486.1 and 656.3 nm, respectively. See syn-
1.1 This terminology defines terms generally used in the
onymous term nu-value and related term dispersion.
glass industry.
acid polishing—the polishing of a glass surface by acid
1.2 In some cases in which a usage is specific to a certain
treatment.
industry, that is spelled out within the definition. For complete-
ness and historical purposes, terms that are outdated are listed
air bells—bubbles of irregular shape formed generally during
as being archaic. The reader is cautioned that some companies
the pressing or molding operations in the manufacture of
or industries may define or use terms differently than the way
optical glass.
these terms are defined within this terminology.
alabaster glass—a milky-white glass that diffuses light with-
1.3 Other sources of glass glossaries are Glass Association
out fiery color.
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of North America’s Glazing Manual, Engineering Standards
2
alcove—a narrow channel to convey molten glass from refiner
Manual for Tempered Glass, Laminated Glass Design Guide,
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to forehearth or to the revolving pot where it is gathered by
and ASTM Committee C-14 standards.
the Owens machine.
2. Referenced Documents
alkali—an industrial term for the oxide of sodium or potas-
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2.1 ASTM Standards:
sium; less frequently of lithium.
C148 Test Methods for Polariscopic Examination of Glass
Containers
ampoule—aglasscontainerdesignedtobefilledandsealedby
C336 Test Method for Annealing Point and Strain Point of
fusion of the glass neck.
Glass by Fiber Elongation
anneal—to attain acceptably low stresses, or desired structure,
C338 Test Method for Softening Point of Glass
or both, in glass by controlled cooling from a suitable
C598 Test Method for Annealing Point and Strain Point of
temperature.
Glass by Beam Bending
C1048 Specification for Heat-Strengthened and Fully Tem-
annealing—a controlled cooling process for glass designed to
pered Flat Glass
reduceresidualstresstoacommerciallyacceptableleveland
C1172 Specification for Laminated Architectural Flat Glass
modify structure.
3. Terminology
annealing point (A.P.)—thattemperaturecorrespondingeither
to a specific rate of elongation of a glass fiber when
Abbé value—the reciprocal dispersive power, a value used in
measured by Test Method C336, or a specific rate of
optical design, expressed mathematically as:
midpoint deflection of a glass beam when measured by Test
Abbe´ value 5 n 2 1 / n 2 n
~ ! ~ !
d F C
Method C598. At the annealing point of glass, internal
where n is the refractive index for the helium line at
d
stresses are substantially relieved in a matter of minutes.
1 annealing range—the range of glass temperature in which
This terminology is under the jurisdiction of ASTM Committee C14 on Glass
and Glass Products and is the direct responsibility of Subcommittee C14.01 on
stress in glass can be relieved at a commercially practical
Nomenclature and Definitions.
rate. For purposes of comparing glasses, the annealing range
Current edition approved Nov. 1, 2015. Published November 2015. Originally
is assumed to correspond with the temperature between the
approved in 1941. Last previous edition approved in 2010 as C162 – 05 (2010).
annealing point (A.P.) and the strain point (St.P.).
DOI: 10.1520/C0162-05R15.
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Available from Glass Association of North America (GANA), 2945 SW
antimony—an industrial term for an oxide of antimony.
Wanamaker Drive, Ste A, Topeka, KS 66614-5321. http://www.glasswebsite.com.
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For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM arch, n—a part of a melter; a crown.
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. arch, v—to heat a pot in a pot arch.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
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C162 − 05 (2015)
arrest mark—See dwell mark. bicheroux process—{archaic} an intermittent process for
arsenic—an industrial term for an oxide of arsenic. making plate glass, in which the glass i
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