From this post links below, he did the "flame test" to them and concluded the black ADBV was nitrile.I went back and re-read entire thread saw no fire test done before my comment. Only saw Overkill comment saying, 'next up'. Nor did a read a fire test in initial ph7317 adbv thread.
^^^^ So as not to be more repetitive on blue adbv, 'my' conclusion and logic for it already addressed this thread HERE.
LOL... do give us the sorted details... Im still looking for my filter cutter, but will be glad to try to duplicate your experiment for the record. I had the ABDV in the freezer. When I took it out, it was stiff but recovered quickly. I decided to take it out and set it on fire. The first 10...