ASTM F1598-95(2014)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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: F1598 − 95 (Reapproved 2014)
Standard Test Method
for Determining the Effects of Chemical/Solvent Exposure to
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.
1. Scope 4. Apparatus
1.1 This test method covers the testing of any surface that
4.1 Watchglass, 1.5 in. (38 mm).
may be exposed to liquid chemical(s).
2 2
4.2 Medical gauze pad, 0.75 in. (19 mm ), 60.125 in. (3
1.2 This test method is not designed for immersion testing
mm).
conditions or material edge attack.
5. Conditioning
1.3 This test method is designed for evaluation of visual
changes. In certain instances physical (non-visual) changes
5.1 Condition all specimens and chemical(s)/solvent(s) for
may occur and functional testing may be appropriate.
72 h at 68 to 77°F (20 to 25°C) and 20 to 80 % relative
humidity (RH).
1.4 The values stated in inch-pound units are to be regarded
as standard. The values given in parentheses are mathematical
5.2 The test specimen should be clean and dry before
conversions to SI units that are provided for information only
testing.
and are not considered standard.
5.3 Cleaning of the Test Specimen :
1.5 This standard does not purport to address all of the
5.3.1 Use a clean lint-free piece of absorbent material and
safety concerns, if any, associated with its use. It is the
either reagent grades of n-heptane or isopropyl alcohol.
responsibility of the user of this standard to establish appro-
5.3.2 Wipe the surface of the test area with a saturated piece
priate safety and health practices and determine the applica-
of cleaning material.
bility of regulatory limitations prior to use.
5.3.3 Dry the test area with fresh absorbent cleaning mate-
rial.
2. Referenced Documents
5.3.4 Repeat these two procedures three times to ensure
2.1 ASTM Standards:
thorough cleanliness.
F1595 Practice forViewing Conditions forVisual Inspection
5.3.5 Inspect the test area to ensure no visual damage has
of Membrane Switches
been caused by the cleaning process.
3. Significance and Use
6. Procedure
3.1 The specific chemical(s) selected is at the discretion of
6.1 Conduct the test at 68 to 77°F (20 to 25°C) and 20 to
the customer and vendor.
80 % RH.
3.2 Variations in results may be expected due to different
6.2 Mark the test specimen with a test field that is approxi-
rates of chemical evaporation. The use of a watchglass with
2 2
mately a size of 2 in. (51 mm ). Mount the specimen
sealed edges is intended to curtail or eliminate evaporation of
horizontally.
the chemical.
2 2
6.3 Completely saturate a 0.75-in. (19-mm ) of gauze with
the test chemical. Place the gauze within the test field and
cover with a watchglass with the edges sealed if necessary to
This test method is under the jurisdiction of ASTM Committee F01 on
ensure that the surface remains wet for the duration of the test
Electr
...