11.1.5.2 If the test specimen is expected to have a flash point above 110 °C or 230 °F, apply the ignition source in the manner described in 11.1.5.1 at each temperature increase of 2 °C or 5 °F, beginning at a temperature of 23 °C 6 5 °C or 41 °F 6 9 °F below the expected flash point. (Warning— As a safety practice, when using automated or manual apparatus, it is strongly advised that, for an expected flash point above 130 °C, to dip the ignitor every 10 °C throughout the test until the sample temperature reaches 28 °C below the expected flash point and then follow the prescribed dipping procedure. This practice has been shown to reduce the possibility of a fire, and, on average, not to significantly affect the result. A limited study5 has shown that this dipping practice has no observable effect on test method repeatability.)
11.1.6 When testing materials to determine if volatile material contamination is present, it is not necessary to adhere to the temperature limits for initial ignition source application as stated in 11.1.5.
11.1.7 When testing materials where the expected flash point temperature is not known, bring the material to be tested and the tester to a temperature of 15 °C 6 5 °C or 60 °F 6 10 °F. When the material is known to be very viscous at this temperature, heat the specimen to a starting temperature as described in 8.6. Apply the ignition source, in the manner described in 11.1.5.1, beginning at least 5 °C or 10 °F higher than the starting temperature.