Thoroughly remix the specimen (soil) in its mixing
cup, and, if necessary, adjust its water content until the
constancy requires about 25 to 35 blows of the liquid limit
device to close the groove. Using a spatula, place a portion(s)
of the prepared soil in the cup of the liquid limit device at the
point where the cup rests on the base, squeeze it down, and
spread it into the cup to a depth of about 10 mm at its deepest
point, tapering to form an approximately horizontal surface.
Take care to eliminate air bubbles from the soil pat, but form
the pat with as few strokes as possible. Keep the unused soil in
the mixing/storage dish. Cover the dish with a wet towel (or
use other means) to retain the moisture in the soil.