9.9 At the end of the pre-heat period and when the top scribe
mark on the piston is visible above the cylinder (or top of the
guide sleeve) and the lower scribe mark is in the cylinder (or
below the top of the guide sleeve) indicating that the piston
land is 46 6 2 mm from the top of the die, reset the timer to
zero then simultaneously make the initial cut-off. Discard the
9.10 Once the extrudate is cool, weigh to the nearest 1 mg.
9.11 Multiply the weight of the extrudate by the appropriate
factor shown in Table 1 to obtain the flow rate in grams per 10
min.