When I am forcing the ammonia’s off of my own Virginias that I grew, I stop when they start to get a vinegary smell, but I can’t that smell to stay. It dissipates pretty quickly for me. M
I tried using acetic acids, and even a few different types of vinegars on my own blends, to see if that might make it more ketchupy, but All I would get was catpiss aromas, ha ha. But, I am a novice, and I’m not privy to the secrets of these blenders. But, I did read in Greg Pease’s blog on this site that vinegar is not a good mold inhibitor, and I did get mold on some blends that I tried the acids and vinegars on. But, like I said, I am not an expert. But, when I did get that smell, it was a natural thing not anything I added. I wish I did know how they do it. I miss the hell out of McClellands.
Of course Greg is not known for getting that ketchupy smell either, and it may be some other reason these companies may be using vinegars. Maybe it serves some other purpose in the blends. We sort fo’ deduced from Per of MacBarens saying that ODF had vinegar that they may have used it for mold inhibotors, but he didn’t say that. Maybe it is used to acidity the blend, or as a casing, or to meld the flavors more, or preventing aliens from stealing our children. Or maybe he just wants the tins to rust, so we will buy more ODF and smoke it faster. Who knows?