Search results
Results from the WOW.Com Content Network
Bone char is primarily made from cattle and pig bones; however, to prevent the spread of Creutzfeldt–Jakob disease, the skull and spine are no longer used. [2] The bones are heated in a sealed vessel at up to 700 °C (1,292 °F); the oxygen concentration must be kept low while doing this, as it affects the quality of the product, particularly its adsorption capacity.
The term black powder was coined in the late 19th century, primarily in the United States, to distinguish prior gunpowder formulations from the new smokeless powders and semi-smokeless powders. Semi-smokeless powders featured bulk volume properties that approximated black powder, but had significantly reduced amounts of smoke and combustion ...
Ejection charge (commonly Black Powder), [1] also called expelling charge, is a pyrotechnic composition, a type of a pyrotechnic gas generator designed to produce a small short-term amount of thrust to burst open a container and eject its content. In model rocketry, ejection charges are used to deploy a recovery system (usually parachute or
A black powder substitute is a replacement for black powder (gunpowder), primarily used in muzzleloading firearms. Substitutes may have slightly different properties from gunpowder such as: reduced sensitivity as an explosive, increased efficiency as a propellant powder, different density, and/or reduced ignition efficiency.
It can generally refer to any powder used to cast a spell, especially if harmful in nature, but specifically refers to a concoction of natural ingredients that can be used to cause harm, trouble or even kill an enemy. Some historical sources, such as some of the interviews conducted by Harry M. Hyatt, indicate goofer dust can be synonymous with ...
A pounce pot (or sprinkler) at the London Science Museum. Pounce [a] or sand [b] is a fine powder, most often made from powdered cuttlefish bone or sandarac resin, that was used both to dry ink and to sprinkle on a rough writing surface to make it smooth enough for writing.
The wide mouth was used for refilling, while the powder was dispensed from the narrow point. In some cases the point was closed and the mouth used for both, with a powder measure, a type of scoop used to dispense the powder, and in others both ends were open and the horn merely used as a funnel. The horn was typically held by a long strap and ...
Main page; Contents; Current events; Random article; About Wikipedia; Contact us