FED-STD-791D
Federal Test Method 10000, Material Handling Safety Precautions, is a reference which
lists all toxic and hazardous materials cited in FTMS 791. The synonyms, life hazard,
flammability, handling and storage precautions, emergency treatment and measures, and
spill practices of each chemical are explained.
5.2 Standard test rubber sheets, type H or FA, fabricated less than one year prior
to use. Test sheets should conform to the properties listed in U.S. Air Force specification
bulletin 539, Standard Elastomer Stocks. If stored for more than one year, the elastomer
should be retested before use. Storage should be in a dark place at a temperature of less
than 25C (77F) away from electrical apparatus.
5.3 Cleaning solution, glass (concentrated sulfuric acid [3,0,2] saturated with
potassium or sodium dichromate [1,0,1], technical grade).
5.4 Solvent naphtha, technical grade [1,4,0].
5.5 Toluene, technical grade [2,3,0].
5.6 Alcohol, ethyl [0,3,0].
5.7 Emery cloth No. 60.
6. PROCEDURE
6.1 Clean all glassware as follows:
a. Rinse in toluene, followed by naphtha, and allow to air dry. An alternative
procedure is to wash in a commercial type dish washer.
b. Soak in glass cleaning solution for 2 h (min.).
c. Rinse thoroughly with tap water, and then with distilled water.
d. Dry in an oven at 100C (212F), and store in dust-free location.
6.2 Clean suspension device and hooks thoroughly with (toluene and naphtha)
solvents, air dry, and store in a dust-free location.
6.3 Preheat and adjust the oven to maintain the required temperature.
6.4 Prepare standard test rubber sheets as follows:
a. Using No. 60 emery cloth, buff both sides of the rubber sheet, using
strokes first in one direction and then at 90 to that direction. Buff just
enough so that no gloss can be seen on the sheet when viewed by reflected
light.
b. Cut three pieces (3.5 5 cm) from the sheet.
c. Punch a 0.3-cm (1/8-in) (approximate) hole at the center of the 5-cm side,
about 0.6 cm (1/4 in) from the edge.
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