ASTM D1929-20 Hot-Air Ignition Furnace Product introduction ISO 871 / ASTM D1929 Plastic Ignition Temperature Testing Equipment. Decompose and release the combustible gas from plastic material under regulated testing conditions ignited by outer flame and burned a certain time to measure the minimum temperature of the material application comparison within material through the testing results. Techncial Parameters 1. Customized ceramic tube with inner diameter of furnace tube