In the below image, you can see a bit of what happens with a good blend with a bit of time on it. After nine years, the dusting of what I imagine is akin to cigar "plume" is visible, notably along the marks left by the flake slicer's blade. The 2-dimensional image is misleading - those aren't 3-D "hairs" standing on the flake; just microscopic which dusting in the tiny valleys left by the blade. Worth noting is that pipe tobacco doesn't seem to have the same confusion as cigars when it comes to its proponents' understanding of mold/plume. If a pipe tobacco molds in the tin, it is a horrid, wretched mess when you open it. Stinks to high Heaven, too. Nasty stuff, and usually the conditions that allow for it have been present in the tin for years and it's grown unchecked. You'll not likely mistake mold when you encounter it after opening that old tin....
![Image](https://halfashed.com/wp-content/uploads/2014/10/Dunhill-Light-Flake-fi2.jpg)