ASTM E1135-19
(Test Method)Standard Test Method for Comparing the Brightness of Fluorescent Penetrants
Standard Test Method for Comparing the Brightness of Fluorescent Penetrants
SIGNIFICANCE AND USE
5.1 The principle use of this procedure is for the comparison of the brightness between batches of fluorescent penetrants compared to a specified standard, as a batch quality control test.
5.2 The procedure is also utilized in monitoring the brightness of an in-use penetrant against the brightness of the unused sample of the same material.
5.3 The significance of the results are not absolute values but rather relative comparisons at a point in time, by a particular laboratory or operator on the specified fluorometer.
SCOPE
1.1 This test method describes the techniques for comparing the brightness of the penetrants used in the fluorescent dye penetrant process. This comparison is performed under controlled conditions that eliminate most of the variables present in actual penetrant examination. Thus, the brightness factor is isolated and is measured independently of the other factors which affect the performance of a penetrant system.
1.2 The brightness of a penetrant indication is affected by the developer with which it is used. This test method, however, measures the brightness of a penetrant on a convenient filter paper substrate which serves as a substitute for the developer.
1.3 The brightness measurement obtained is color-corrected to approximate the color response of the average human eye. Since most examinations are done by human eyes, this number has more practical value than a measurement in units of energy emitted. Also, the comparisons are expressed as a percentage of some chosen standard penetrant because no absolute system of measurement exists at this time.
1.4 The measurements made by this standard compare the brightness of a candidate penetrant to that of a standard penetrant when tested according to the technique. There is no known correlation between the results obtained and the brightness of actual flaw indications obtained using the penetrant in inspection.
1.5 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.
1.6 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.
General Information
Relations
Standards Content (Sample)
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: E1135 − 19
Standard Test Method for
1
Comparing the Brightness of Fluorescent Penetrants
This standard is issued under the fixed designation E1135; 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.
1. Scope* 2. Referenced Documents
2
1.1 This test method describes the techniques for comparing 2.1 ASTM Standards:
the brightness of the penetrants used in the fluorescent dye
E1316 Terminology for Nondestructive Examinations
penetrant process. This comparison is performed under con-
trolled conditions that eliminate most of the variables present
3. Terminology
in actual penetrant examination. Thus, the brightness factor is
3.1 Definitions:
isolated and is measured independently of the other factors
3.1.1 Definitionsoftermsapplicabletothistestmethodmay
which affect the performance of a penetrant system.
be found in Terminology E1316.
1.2 The brightness of a penetrant indication is affected by
the developer with which it is used.This test method, however,
4. Summary of Test Method
measures the brightness of a penetrant on a convenient filter
4.1 Simulated indications are prepared by impregnating
paper substrate which serves as a substitute for the developer.
filter paper with a specified quantity of the penetrant under test.
1.3 The brightness measurement obtained is color-corrected
The samples and similarly prepared standards are then mea-
to approximate the color response of the average human eye.
sured in a fluorometer equipped to excite the penetrant with
Since most examinations are done by human eyes, this number
near ultraviolet (UV-A) light and respond to color approxi-
has more practical value than a measurement in units of energy
mately as does the human eye under the conditions encoun-
emitted.Also,thecomparisonsareexpressedasapercentageof
tered during a normal examination. The fluorometer must be
some chosen standard penetrant because no absolute system of
equipped with a special sample holder to accept the samples
measurement exists at this time.
employed.
1.4 The measurements made by this standard compare the
4.2 The sample test results are not indicative of the total
brightness of a candidate penetrant to that of a standard
system performance but are convenient as a lot acceptance test,
penetrant when tested according to the technique. There is no
and to monitor the condition of in-use penetrant compared to
known correlation between the results obtained and the bright-
anunusedsample.Aknownamountofpenetrantisdilutedwith
ness of actual flaw indications obtained using the penetrant in
a specified amount of a volatile solvent, pieces of filter paper
inspection.
are soaked in the mixture, the papers are dried under specified
1.5 This standard does not purport to address all of the
conditions at room temperature, placed in the sample holder,
safety concerns, if any, associated with its use. It is the
and measured with the fluorometer.
responsibility of the user of this standard to establish appro-
priate safety, health, and environmental practices and deter-
5. Significance and Use
mine the applicability of regulatory limitations prior to use.
5.1 Theprincipleuseofthisprocedureisforthecomparison
1.6 This international standard was developed in accor-
of the brightness between batches of fluorescent penetrants
dance with internationally recognized principles on standard-
compared to a specified standard, as a batch quality control
ization established in the Decision on Principles for the
test.
Development of International Standards, Guides and Recom-
5.2 The procedure is also utilized in monitoring the bright-
mendations issued by the World Trade Organization Technical
ness of an in-use penetrant against the brightness of the unused
Barriers to Trade (TBT) Committee.
sample of the same material.
1
This test method is under the jurisdiction of ASTM Committee E07 on
Nondestructive Testing and is the direct responsibility of Subcommittee E07.03 on
2
Liquid Penetrant and Magnetic Particle Methods. For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Current edition approved Feb. 1, 2019. Published March 2019. Originally contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
approved in 1986. Last previous edition approved in 2012 as E1135 – 12. DOI: Standards volume information, refer to the standard’s Document Summary page on
10.1520/E1135-19. the ASTM website.
*A Summary of Changes section appears at the end of
...
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