ASTM F1598-95(2007)
(Test Method)Standard Test Method for Determining the Effects of Chemical/Solvent Exposure to a Membrane Switch/Graphic Overlay (Spot Test Method)
Standard Test Method for Determining the Effects of Chemical/Solvent Exposure to a Membrane Switch/Graphic Overlay (Spot Test Method)
SCOPE
1.1 This test method covers the testing of any surface that may be exposed to liquid chemical(s).
1.2 This test method is not designed for immersion testing conditions or material edge attack.
1.3 This test method is designed for evaluation of visual changes. In certain instances physical (non-visual) changes may occur and functional testing may be appropriate.
1.4 The values stated in inch-pound units are to be regarded as the standard. The values given in parentheses are for information only.
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.
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Designation: F1598 − 95(Reapproved 2007)
Standard Test Method
for Determining the Effects of Chemical/Solvent Exposure to
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a Membrane Switch/Graphic Overlay (Spot Test Method)
This standard is issued under the fixed designation F1598; 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.
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1. Scope 4.2 Medical gauze pad, 0.75 in. (19 mm ), 60.125 in. (3
mm).
1.1 This test method covers the testing of any surface that
may be exposed to liquid chemical(s).
5. Conditioning
1.2 This test method is not designed for immersion testing
5.1 Condition all specimens and chemical(s)/solvent(s) for
conditions or material edge attack.
72 h at 68 to 77°F (20 to 25°C) and 20 to 80 % relative
1.3 This test method is designed for evaluation of visual
humidity (RH).
changes. In certain instances physical (non-visual) changes
5.2 The test specimen should be clean and dry before
may occur and functional testing may be appropriate.
testing.
1.4 The values stated in inch-pound units are to be regarded
5.3 Cleaning of the Test Specimen :
as the standard. The values given in parentheses are for
information only. 5.3.1 Use a clean lint-free piece of absorbent material and
either reagent grades of n-heptane or isopropyl alcohol.
1.5 This standard does not purport to address all of the
5.3.2 Wipe the surface of the test area with a saturated piece
safety concerns, if any, associated with its use. It is the
of cleaning material.
responsibility of the user of this standard to establish appro-
5.3.3 Dry the test area with fresh absorbent cleaning mate-
priate safety and health practices and determine the applica-
rial.
bility of regulatory limitations prior to use.
5.3.4 Repeat these two procedures three times to ensure
2. Referenced Documents
thorough cleanliness.
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2.1 ASTM Standards:
5.3.5 Inspect the test area to ensure no visual damage has
F1595 Practice forViewing Conditions forVisual Inspection
been caused by the cleaning process.
of Membrane Switches
6. Procedure
3. Significance and Use
6.1 Conduct the test at 68 to 77°F (20 to 25°C) and 20 to
3.1 The specific chemical(s) selected is at the discretion of
80 % RH.
the customer and vendor.
6.2 Mark the test specimen with a test field that is approxi-
3.2 Variations in results may be expected due to different
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mately a size of 2 in. (51 mm ). Mount the specimen
rates of chemical evaporation. The use of a watchglass with
horizontally.
sealed edges is intended to curtail or eliminate evaporation of
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the chemical.
6.3 Completely saturate a 0.75-in. (19-mm ) of gauze with
the test chemical. Place the gauze within the test field and
4. Apparatus
cover with a watchglass with the edges sealed if necessary to
4.1 Watchglass, 1.5 in. (38 mm).
ensure that the surface remains wet for the duration of the test
period. If the test specimen is embossed, perform the test on an
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This test method
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