|
|
All you need is an empty soda can. You can probably get dozens from your cola-addicted
Uncle Ned. Choose ones in pristine condition with no dents or wrinkles.
Use a sturdy pair of scissors (not your wife's good sewing shears) and poke a hole
into the side of the can near one end. Simply cut around the cylinder to remove both
the bottom and the top of the can.
|
|
Now cut down the length of the can. When finished you will have a curly rectangle
of aluminum about 4 inches wide by 8 inches long.
From this rectangle you can cut two trapezoidal shapes with a long side of about
4 inches and a short side of about 2.5 to 3 inches.
You can tailor the short side to the size of tube you will be filling with the funnel.
|
|
I usually rough cut the shapes with the scissors and then straighten all the
edges with a desk top paper cutter. Finally, you will want to use the scissors
to round off the sharp corners.
|
|
To use the funnel I either place some composition in the funnel while laying
horizontally on the work bench and then pinch the short end to curl it as the
funnel is applied to the target tube
or I will hold the funnel in place and add the composition charge directly
from the scoop. These funnels work so well because the aluminum has a smooth
plastic coating which allows powders
to slide easily and because their flexibility allows you to warp them to
encourage the powders to slide. These funnels are easy to keep clean and,
with care, will last a long time. When they get
a little beat up, I just chuck them and make more.
|
|