Moisture Matters

Moisture Matters
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The other day, I was having a conversation with a friend about tobacco moisture. He tends to believe that a freshly opened tin presents the blender’s notion of the ideal moisture content for that tobacco, and that’s how it should be smoked. He’s not wrong, but as with so many things in our wacky world, it’s a little more complicated than that. When thinking about ideal moisture content for any specific tobacco, there are criteria for determining “correct” levels that can sometimes be at odds with one another. The proper moisture content for packaging tobacco, for instance, may not be the ideal moisture for smoking it.

By way of background, let’s have a very brief and simplified look at the life of our beloved leaves once they’ve left the curing barns. Whole leaves or strips, the lamina of the leaves with the midrib removed, are boxed or baled quite dry for storage and transport. Before the tobacco can be worked, it has to be conditioned to a moisture level that allows it to be handled without shattering. There are various ways to accomplish this, but the end result is leaf that is pliable and easily manipulated without breaking. It can then be pressed into soft cakes that are cut into ribbons, or blended in stacks destined to be turned into plugs or flakes. At this point, it’s too moist to be considered “finished,” and has to go through a redrying stage. Since all of these steps may take place over a matter of months, or even years, tobacco can go through several conditioning/redrying cycles before it becomes the finished product. 

When it’s time to package a blend, the moisture level of the tobacco may have to be adjusted once again. If it’s too damp, there’s an increased risk of mold blooms, either within the sealed tin, or when spores are introduced after the tin is opened. This is never a good thing, so there’s a fairly hard upper limit to how much moisture is acceptable at this stage. 

If the leaf is too dry, on the other hand, things get troublesome in a different way. Dry, fragile tobacco can break into small fragments, even to the point of some of the leaf turning to dust during handling when packing the tins, and when those tins are jostled about during transport. This, again, is not ideal, establishing a lower limit for moisture content.

Then, there’s the tobacco’s potential for aging to be considered. In order for these biological and chemical changes to take place, there has to be enough moisture to support the metabolic processes of the microorganisms involved in the various stages of fermentation that begin once the tin is sealed, and to allow for equilibration of various volatile byproducts of those processes.

Finally, within the relatively wide window of upper- and lower-boundary conditions, there’s the moisture level for best smokability to be considered. That’s where things can get a little tricky. Different smokers have different preferences, and this is confounded by the fact that different types of tobaccos behave differently when their relative moisture content changes. 

To my palate, mixtures containing high percentages of latakia or oriental tobaccos generally tend to smoke and taste their best when on the dry side, while blends that predominantly comprise Virginia tobaccos like a bit more moisture to bring out their sweetness. But, this is a very general guideline, and I often find exceptions. Sometimes the same tobacco can be quite mercurial in its presentation depending on how damp or dry it is. The other day, I had a bowl of a latakia and Virginia-rich flake, fresh out of the tin with no drying time, and it was delightful, with the sweetness of the virginias taking center stage. A subsequent bowl, after a bit of drying time, rendered the orientals more forward, softened the sweetness, and polished the sharper edges of the latakia’s flavor profile. Same tobacco; two very different experiences.

Additionally, things like ambient air temperature and relative humidity can play a significant role in the way any tobacco burns, but more importantly, how it tastes. (When it’s hot and humid, I generally abandon my latakia mixtures in favor of VAs and VA/perique blends.) 

If you haven’t experimented with this, it’s a fun thing to play with. Take enough tobacco out to fill your next bowl, and let it sit out for a while – anything from a few minutes to an hour or two, depending on the climate. (For those in tropical zones, this might actually have the opposite result. Yes, there really are people in some parts of the world who keep their tins sealed to keep moisture from getting in, not out.) See how it tastes in comparison to fresh from the tin. When tobacco is on the dry side, a gentle hand when packing is advised. 

What about when we rediscover an opened, long-forgotten tin whose contents have become all but desiccated? Can it be brought back to life? While the tobacco won’t return 100% to its best form, as some of the volatile components from aging will be lost to the ether, it can certainly be made smokeable again, and might yield some pleasant surprises. Of course, first give it a try as is, and see what it’s like. 

There are a couple of good ways to bring the moisture level up, and some not so good ways. I don’t recommend spraying it with water, putting apple or potato slices in the tin, or any other drastic measures. Tobacco takes up moisture much more slowly than loses it, and it will take time for all the strands to reach equilibrium, so a gentle approach is advised. My favorite is to put the leaf in a small bowl, cover the bowl with a damp cloth or paper towel, and set a plate on top. Keep an eye on it over a day or two, checking the progress periodically and ensuring the cloth remains damp. This also works well with flakes, and even plugs, though it will take much longer. Once the tobacco reaches your preferred moisture level, jar it up, and it’s good to go.

An alternative way to get an idea of whether or not the tobacco will come back to life is to fill a pipe with the dry leaf and blow through it from the bowl end a few times. There’s enough moisture in the exhaled breath to do a pretty good job of bringing the moisture content back up.

The moisture level of a tobacco can have a significant impact on the way it burns, of course, but also on its flavor. It’s just another factor to explore – along with things like packing density, how much or how little we rub out flakes, and bowl geometry versus different blend styles – on our journey to the perfect smoke. 

Play with your tobacco and have fun with it!

Photo by G.L. Pease




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