“Blood grooves” sure do sound cool, don’t they? The term is a hair away from “gore trench,” “kill ditch” or “splatter line.” All of these would make for fine garage band names, but we’re talking about knives here. And that’s why I need to clear something up about blood grooves.
Blood grooves consist of a long depression cut into a blade. Here’s an example.
It’s said blood grooves channel fluids away or reduce suction when the blade is removed from flesh (or, more likely for most people, watermelons). I got news for you. Gravity takes care of fluids and suction is going to happen anyway.
Instead, blood grooves are worked into a blade to reduce its weight without sacrificing length. This helps a knifemaker or designer achieve better balance. Blood grooves may also be used for looks, since people think they’re badass.
Well, there’s nothing badass about the technical name for blood grooves, “fullers.” Snooze. Sword makers originally used fullers for balance before the technique was imported into knives.
I’ve only read a few instances from novels where blood grooves are mentioned. If you decide to do the same when writing, just keep in mind their only practical purposes are balance and aesthetics.
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The Writer’s Guide to Weapons: A Practical Reference for Using Firearms and Knives in Fiction (Writer’s Digest Books) comes with everything but the ammo. Pick up a print or digital copy from these fine retailers: