Walk-through portal systems directly address the threat of guncotton
On confirmation that the vessel was an enemy, the mine (or usually a group of four mines, each containing 50 or 100 lbs (23 or 45 kg) of guncotton
) was detonated.
In 1851 collodion, (guncotton
in alcohol and ether), was introduced to the photographic process as a coating on glass plates to which a light sensitive emulsion could be placed.
At first he claimed that it was not the Germans who sank a British liner at sea during the First World War, but the British who were to blame for the appalling loss of life, using an explosive (Guncotton
) which was activated by sea water.
Then came a plethora of new products: nitroglycerine, dynamite, guncotton
, TNT and the modern mining and civil engineering explosives.
The astonished Schonbein experimented further and found he had discovered nitrocellulose, or as it came to be called, guncotton
To obtain unambiguous results, Bartknecht suggests the use of chemical ignitors (E = 10 KJ), 20 to 50 g of guncotton
, and the flame of a welding torch.
As I mentioned in past columns, Scot's selling point is that their powders are made from nitrocotton, alias guncotton
, rather than wood-derived nitrocellulose; for it is maintained that cotton is a more uniform product than wood and, consequently, cotton will therefore be more uniform as a propellant.
A medical examiner's report stated that traces of nitrocellulose - an explosive material also known as guncotton
- was found on shrapnel pulled from the victim.