17. Calculation
17.1 Calculate the percent change in mass as follows (Section 10):
17.2 Calculate the percent change in volume as follows (Section 11):
17.3 Calculate the percent change in dimensions as follows (Section 12):
17.4 Calculate the change in mass for single surface exposure as follows (Section 13):
17.5 Calculate percent extracted soluble matter as follows (Section 14):
17.6 Calculate tensile strength of the specimens both on immediate deteriorated properties and properties after evaporation of the test liquid as described in the Calculation section of Test Methods D412.
17.6.1 Based on the original unstretched cross-sectional area:
17.6.2 Based on the swollen unstretched cross-sectional area:
17.6.3 To express tensile strength and ultimate elongation after immersion as a percentage change from the original properties, use the following formula:
17.6.4 Calculate hardness change after immersion in hardness units:
17.7 Calculate breaking resistance, burst strength, tear strength, and adhesion both on the immediate deteriorated properties and properties after evaporation of volatile test liquid as described in Test Method D751. If desired, results may also be expressed in percentage change after immersion as detailed in 17.6.3.