ASTM D3601 Standard Test Method for Foam In Aqueous Media (Bottle Test)
5. Apparatus
5.1 Water Bath, constant-temperature, suitable to hold several bottled emulsions at 25 +/- 1°C (77 +/- 1.8°F) for 1 to 2 h.
NOTE 3 - A common household dishpan is satisfactory when the test temperature is close to room temperature.
5.2 Stop Watch or Timer, capable ofmeasuring 5 min +/- 0.2 s.
5.3 Bottles, clean or new, clear glass, 16-oz (narrow mouth), with screw neck. The 16-oz bottle is 6 41/64 in. (169 mm) tall and has a maximum diameter of 2 31/32 in. (75 mm). The outside neck is 9/32 in. (7.1 mm) and the shoulder radius is 1 in. (25.4 mm).
5.4 Syringe or Transfer Pipet.
5.5 Rule, millimetre, at least 150 mm in length.
6. Materials
6.1 Distilled Water.
6.2 Hard Water, 20 000 ppm prepared by dissolving 29.4 g of reagent grade (ACS standard) CaCl2·2H2O in 1 litre of freshly boiled distilled water (used only where distilled water is used as in Note 5).
