DO YOU WANT LONGER LASHES?
"What is the best material to use for a cracker?"
Good question! I cannot say there is any one "best" material for a cracker. They all have their plusses and minuses.
Personally, for everyday use, I use mason's twine from hardware stores. I can skin it down to the thinness I want, I can choose my own colors (lighter for darker rooms) and it is not cost-prohibitive. I also use embroidery thread, which is durable and makes a sharp crack.
I've been given some human hair to see what I can do with it, and that experiment is still going on. I have used horsehair, silk, polyester thread, twine, fishing line, etc.
After choosing the material, I look at the end use of the cracker -- will I be performing soft wraps around a finger, or do I need to be able to slice a banana, or do I want a LOUD crack with the least effort. This allows me to make the cracker that will most suit the purpose, because when you make your own crackers, you have a lot of control over that aspect of your whip's performance.
The key, whatever the material, is make it as tightly as possible so it will carry the energy wave without losing power due to internal friction. Here's how: Figure out how long and how thick you want the final cracker. However many strands you decide on, the cracker will be one-quarter of the length of the original strands and four times as thick.
Make a loop (add a knot), put a chopstick through each end of the loop and start twisting one while you anchor the other one between your knees. When it is tight as a guitar string and won't go any tighter without starting to double on itself, pinch the center of the twirled string and pull toward yourself, allowing the two chopsticks to rest against each other.
When you let go of the string, it will spring into action and become your cracker. Add the knot wherever you want, making the fuzzy part as short or long as you like -- or as I often do, snip it half and half for a two-tone crack. Trim off the excess (such as the original knot when you made the loop). You're ready to go.
If I want something more aerodynamic, I will tie the cracker's knot in a fisherman's double hitch, making the knot smoother and smaller.
When in doubt, remember that tighter is always better. It's all about the physics.