ASTM D6668 Standard Test Method for Discrimination Between Flammability Ratings of F = 0 and F = 1
6. Test Specimen
6.1 Liquid Sample - 30 mL is sufficient for the performance of this test method.
6.2 Solid Specimens - 30 g are sufficient for the performance of this test method.
7. Apparatus
7.1 Flask Heater, 750 W with transformer control heater, stepless, repeatable +/- 0.6 W.
7.2 Temperature Readout Device, any potentiometric or electronic device capable of reading the temperature of a chromel alumel thermocouple within +/- 1°F (0.6°C).
7.3 Chromel-Alumel Thermocouple , 24 gauge, welded to center of stainless steel planchet.
7.4 Stainless Steel Planchet, 26 gauge, 50 mm diameter by 12.7 mm deep.
7.5 Borosilicate Chimney, 70 mm O.D. by 230 mm high mounted over planchet with 2.5 mm air gap between bottom of chimney and top of planchet holder surface.
7.6 Planchet Holder, ceramic composite capable of withstanding 1500°F (815.5°C), 127 by 127 mm thick with 54 mm centrally located hole to hold planchet.
7.7 Ceramic Cord, approximately 0.8 mm diameter to be wrapped around planchet, if needed, to hold it firmly in place in the planchet holder.
7.8 Hypodermic Syringe, 0.5 mL with 450 mm 26 gauge needle. TFE-fluorcarbon tipped plunger is preferred.
7.9 Assembled Test Apparatus, see Fig. 1.
8. Materials
8.1 Mineral Spirits, Specification D235, Type 1.
8.2 Steel Wool.
8.3 Absorbent Tissue.
