One of the cels I recently received is definitely emitting a faint vinegar aroma. Or moderate vinegar aroma. Either way, it is disconcerting.

Thanks!
That is my concern. I have heard from another collector that bathing the cel in sodium bicarbonate (baking soda) reduces the smell dramatically. That might be the same basic premise as S/R Labs's process: loading the acetate with an alkaline or acid-neutralizing compound, then (apparently) coating it with some kind of transparent sealant. But I worry that routinely doing so may have other consequences, e.g., color shifts in cel paint. A similar practice of spraying paper with calcium carbonate has gotten mixed reviews among collectors of other kinds of paper artifacts because of visible color shifting as a result.Jadeduo wrote: I also wonder what exactly they do when they say they make the chemicals in your cel effectively inert? What exactly do they do to it? Is it dipped or sprayed with chemicals? Is it basically sealed against everything?