Decoppering agents

The principal Italian uses of Military BkPdrs are as igniters in percussion primers. For example, the Igniter of the 105/28mm cartridge case contd 25—30g of BkPdr ca 5g of lead foil, serving as a decoppering agent (Ref 28, p 345)... 

One of the most recent uses for Pb is the addition, in the form of foil or coil of wire, to propint pdr as a decoppering agent for the bore of the gun. The Pb is placed between the pro-pint charge and the projectile... 

Accdg to J.E. Capell, formerly of Pic-Arsenal, some other (than US or Russia) countries tried friction lubricants, but they did not think that they were of great value (See also Decoppering Agents in Vol 3, d D36-R)... 

Decoppering agents tin, lead-tin foil or lead compounds etc. 

Entkupferungsmittel. Ger for Decoppering Agent, such as described in Vol 3 of Encycl, p D36-R... 

Decoppering agent Lead or tin foil, compounds containing lead or tin Remove deposits of copper left by the driving band... 

Anticoppor]rig or Decoppering Agents. See under Fouling of Guns and Antifouling Agents... 

Some info on American decoppering agents, particularly of lead foil laminated to the cartridge bag is given in Refs 2 3... 

It was the first agent used to treat Wilson disease as a decoppering agent. It must be administered by intramuscular injection its use was all but abandoned in favor of orally available chelating agents. 

If a decoppering agent is used for treatment, the compliance can be tested by repeated measurements of the 24 h urinary copper excretion. This approach is not useful if patients are treated with zinc. The dose of d-penicillamine can be lowered if in a compliant patient urinary copper excretion decreases over time and stabilizes at < 500 p g/day. Efficacy of treatment can be monitored by the determination of free copper in serum, and depending on the presenting symptoms. Liver disease can be assessed by routine liver function tests. Repeated liver biopsies with measurement of hepatic copper content are not helpful. Improvement of neurological symptoms can be documented by clinical examination or by auditory evoked brainstem potentials. In addition, some of the MRI abnormalities are fully reversible on treatment. 

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