The container must now be put into ice/salt water and cooled to
below 5 degrees Celsius. The easiest way to do this: take a coffee
can, put in water and salt to about half full, put container
(empty) into can, put plastic lid on can to keep container from
floating, put can in freezer, when water is frozen, take out,
remove lid, proceed. This will provide excellent cooling and also
keep container from floating.
Now, put a thermometer in the mixture. When it is below 5 degrees
Celsius, start putting in the sulfuric acid, one drop at a time.
Keep stirring and watching the thermometer. Adding the acid
produces heat; if it gets up to 10 degrees, stop adding acid and
wait for it to cool. You need to add a total of 2.5 milliliters of
sulfuric acid, one drop at a time.
Keep stirring for a couple minutes after adding all the acid. Put
the container in the fridge (not freezer) and let it sit overnight.
When you get it out the next morning, there will be a white
precipitate on the bottom.
Pour the solution through a coffee filter, paper towel, or other
filtering paper. This will collect the precipitate. Pour a couple
of spoonfuls of ice-cold water through the towel to remove acid.
Now set the paper out to dry. The resulting powder/crystals are a
very powerful primary explosive.ːsteamhappyː