ASTM C756-87(2016)

Standard Test Method for Cleanability of Surface Finishes

SIGNIFICANCE AND USE
4.1 This test method was developed to guide the user in selecting a finish coating or material that is resistant to soiling in a particular application.  
4.2 The numerical values derived by this test method enables the user to rank finish coatings and materials in regard to soil retention or ease of soil removal.
SCOPE
1.1 This test method covers the numerical evaluation of the ease or difficulty of cleaning soiled surface finishes. This test method is applicable to all surface finishes not affected by water.  
1.2 Values given in SI units are to be regarded as the standard. Inch-pound units are provided for information only.  
1.3 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 and health practices and determine the applicability of regulatory limitations prior to use.

General Information

• Status: Historical
• Publication Date: 31-Oct-2016
• ICS: 25.220.20 - Surface treatment
• Technical Committee: B08 - Metallic and Inorganic Coatings
• Drafting Committee: B08.12 - Materials for Porcelain Enamel and Ceramic-Metal Systems

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation: C756 − 87 (Reapproved 2016)
Standard Test Method for
1
Cleanability of Surface Finishes
This standard is issued under the fixed designation C756; 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.
INTRODUCTION
This test provides a procedure to quantify the cleanability of acid-resistant porcelain enamel using
a fluorescent water-soluble soil in agent, a reproducible machine-wiping technique, and a means of
measuring the amount of residual soil by fluorescence.
1. Scope inasimilarmanner.Thecleanabilityindexofthesurfaceunder
testisexpressedastheratioofthefluorescenceofthesolutions
1.1 This test method covers the numerical evaluation of the
extracted from the test surface and from the standard reference
ease or difficulty of cleaning soiled surface finishes. This test
surface. Cleanability indexes greater than 1.0 indicate that the
method is applicable to all surface finishes not affected by
test surface is more difficult to clean than the standard
water.
reference surface, while indexes less than 1.0 indicate that the
1.2 Values given in SI units are to be regarded as the
test surface is more easily cleanable than the standard of
standard. Inch-pound units are provided for information only.
comparison.
1.3 This standard does not purport to address all of the
3.2 The soiling agent used consists of polyethylene glycol,
safety concerns, if any, associated with its use. It is the
a black dye, and a fluorescent tracer, each of which is readily
responsibility of the user of this standard to establish appro-
water soluble.
priate safety and health practices and determine the applica-
bility of regulatory limitations prior to use.
4. Significance and Use
4.1 This test method was developed to guide the user in
2. Referenced Documents
selecting a finish coating or material that is resistant to soiling
2
2.1 ASTM Standards:
in a particular application.
C282 Test Method for Acid Resistance of Porcelain Enam-
4.2 The numerical values derived by this test method
els(Citric Acid Spot Test)
enables the user to rank finish coatings and materials in regard
C614 Test Method forAlkali Resistance of Porcelain Enam-
to soil retention or ease of soil removal.
els
5. Apparatus
3. Summary of Test Method
5.1 Motor-Driven Lapping Plate, 203-mm (8-in.) diameter,
3.1 The test method consists of applying an exact amount of
3
speed 163 r/min.
a fluorescent water-soluble soiling agent to a specimen surface
and then cleaning the surface with a reproducible machine-
5.2 Automatic Polishing Unit, 11-s cycle, adjustable to
4
7
wiping technique. The soil remaining on the specimen after
48-mm (1 ⁄8-in.) stroke.
wipingisextractedwithawatersolventandthefluorescenceof
5.3 Hypodermic Syringe, glass, 2-mL capacity, without
the solution measured. A standard reference surface is treated
needle.
5.4 Repeating Pipet, 0.025 mL (25 µl) capacity.
1
ThistestmethodisunderthejurisdictionofASTMCommitteeB08onMetallic
5.5 Repeating Pipet, 10-mL capacity.
and Inorganic Coatings and is the direct responsibility of Subcommittee B08.12 on
Materials for Porcelain Enamel and Ceramic-Metal Systems.
Current edition approved Nov. 1, 2016. Published November 2016. Originally
ɛ1
3
approved in 1973. Last previous edition approved in 2011 as C756 – 87 (2011) . Suitable lapping plates are available from Buehler Ltd., 2120 Greenwood St.,
DOI: 10.1520/C0756-87R16. Evanston, IL60204, Struers, Inc., 20102 Progress Drive, Cleveland, OH, 44136; or
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or other Metallurgical Supply Sources.
4
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM An Olsen “S.M.” Automatic Polisher has been found suitable and is available
Standards volume information, refer to the standard’s Document Summary page on under the code name OLPOL from Struers, Inc., 20102 Progress Drive, Cleveland,
the ASTM website. OH 44136.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
C756 − 87 (2016)
5.6 Desiccator approximately 254 mm (10 in.) diameter. 6. Reagents and Materials
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5.7 Cleaning Head, brass, 57 mm (2 ⁄4 in.), with worm- 6.1 Cleaning Tissues, approximately 127 by 229 mm (5 by
7
driven hose clamp for attachment of cleaning tissues (Fig. 1). 9 in.).
Cleaning Head, Brass Soiling Head, Brass
Metric Equivalents
AB C D E F G H
1 5 7 3 5 3 3
in. 2 ⁄4 ⁄8 ⁄8 ⁄16 1 ⁄8 ⁄4 ⁄16
(mm) (57) (16) (22) (5) (25) (16) (19) (5)
FIG. 1 Cleaning and Soiling Heads
5.8 Soiling Head, brass, 25 mm (1 in.) diame
...

This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
´1
Designation: C756 − 87 (Reapproved 2011) C756 − 87 (Reapproved 2016)
Standard Test Method for
1
Cleanability of Surface Finishes
This standard is issued under the fixed designation C756; 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
ε NOTE—Test Method was corrected editorially in 2011
INTRODUCTION
This test provides a procedure to quantify the cleanability of acid-resistant porcelain enamel using
a fluorescent water-soluble soil in agent, a reproducible machine-wiping technique, and a means of
measuring the amount of residual soil by fluorescence.
1. Scope
1.1 This test method covers the numerical evaluation of the ease or difficulty of cleaning soiled surface finishes. This test method
is applicable to all surface finishes not affected by water.
1.2 Values given in SI units are to be regarded as the standard. Inch-pound units are provided for information only.
1.3 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 and health practices and determine the applicability of regulatory
limitations prior to use.
2. Referenced Documents
2
2.1 ASTM Standards:
C282 Test Method for Acid Resistance of Porcelain Enamels(Citric Acid Spot Test)
C614 Test Method for Alkali Resistance of Porcelain Enamels
3. Summary of Test Method
3.1 The test method consists of applying an exact amount of a fluorescent water-soluble soiling agent to a specimen surface and
then cleaning the surface with a reproducible machine-wiping technique. The soil remaining on the specimen after wiping is
extracted with a water solvent and the fluorescence of the solution measured. A standard reference surface is treated in a similar
manner. The cleanability index of the surface under test is expressed as the ratio of the fluorescence of the solutions extracted from
the test surface and from the standard reference surface. Cleanability indexes greater than 1.0 indicate that the test surface is more
difficult to clean than the standard reference surface, while indexes less than 1.0 indicate that the test surface is more easily
cleanable than the standard of comparison.
3.2 The soiling agent used consists of polyethylene glycol, a black dye, and a fluorescent tracer, each of which is readily water
soluble.
4. Significance and Use
4.1 This test method was developed to guide the user in selecting a finish coating or material that is resistant to soiling in a
particular application.
4.2 The numerical values derived by this test method enables the user to rank finish coatings and materials in regard to soil
retention or ease of soil removal.
1
This test method is under the jurisdiction of ASTM Committee B08 on Metallic and Inorganic Coatings and is the direct responsibility of Subcommittee B08.12 on
Materials for Porcelain Enamel and Ceramic-Metal Systems.
Current edition approved April 1, 2011Nov. 1, 2016. Published April 2011November 2016. Originally approved in 1973. Last previous edition approved in 20062011 as
ɛ1
C756 – 87 (2006).(2011) . DOI: 10.1520/C0756-87R11E01.10.1520/C0756-87R16.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
C756 − 87 (2016)
5. Apparatus
3
5.1 Motor-Driven Lapping Plate, 203-mm (8-in.) diameter, speed 163 r/min.
4
7
5.2 Automatic Polishing Unit, 11-s cycle, adjustable to 48-mm (1 ⁄8-in.) stroke.
5.3 Hypodermic Syringe, glass, 2-mL capacity, without needle.
5.4 Repeating Pipet, 0.025 mL (25 μl) capacity.
5.5 Repeating Pipet, 10-mL capacity.
5.6 Desiccator approximately 254 mm (10 in.) diameter.
1
5.7 Cleaning Head, brass, 57 mm (2 ⁄4 in.), with worm-driven hose clamp for attachment of cleaning tissues (Fig. 1).
Cleaning Head, Brass Soiling Head, Brass
Metric Equivalents
A B C D E F G H
1 5 7 3 5 3 3
in. 2 ⁄4 ⁄8 ⁄8 ⁄16 1 ⁄8 ⁄4 ⁄16
(mm) (57) (16) (22) (5) (25) (16) (19) (5)
FIG. 1 Cleaning and Soiling Heads
5.8 Soiling Head, brass, 25 mm (1 in.) dia
...