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Blister copper · verified sellers
Blister copper suppliers are copper smelters and the traders who buy from them, mainly in Zambia, the DRC and Namibia. A real supplier can name the smelter, give an assay of each lot and accept independent sampling and weighing. On Copper Supply every member passes an ID check before they can message you, and you can post a free buying requirement so sellers come to you.
No live blister copper selling offers right now. Post yours and members who trade blister copper are emailed within minutes.
Post it freeBlister comes only from a smelter. There are not many in Africa, so a real supplier can name the smelter, and the smelter's output is public. A trader should have written authority from the smelter or a contract that shows the copper is theirs to sell.
Real blister offers come with an assay that covers more than copper: sulphur, oxygen, and impurities such as arsenic, lead, nickel and bismuth, plus gold and silver if the smelter feed contained them.
Post a buying requirement with the grade, impurity limits, tonnage, delivery point and pricing basis. It is free. Members who sell blister get an email within minutes, and you choose who to talk to.
Free to join. Copper Supply never holds trade money and takes no commission on deals.
Blister copper is impure copper, typically about 98% to 99.5% Cu, produced by a smelter from copper matte. It gets its name from the blisters on its surface left by gas released as it cools. It is fire-refined into anodes and then electrorefined into cathode.
On the payable copper at the LME average over an agreed period, minus a refining charge, plus payable gold and silver, minus penalties for impurities. In African trade it is often sold more simply at a discount to the LME.
Copper refineries with anode furnaces and electrorefining, integrated smelters and the trading houses that supply them. China and India have the largest refining capacity.
From copper smelters, mainly in Zambia, the DRC and Namibia. A real offer names the smelter, and the tonnage should fit what that smelter produces.
How deals work3 min read
From the first introduction to delivery: the eight stages of a real copper trade, who does what at each one, and where deals usually break.
Read the guideDocuments2 min read
Independent inspection is the backbone of safe copper trading. What an inspector checks, which report you need at which stage, and how to verify one.
Read the guideThe market2 min read
Where Central African copper is produced, the road and rail corridors it travels, and the warehouses where most trades are inspected and paid.
Read the guidePayment
Post it free. Members who trade it get an email within minutes, and only ID-checked people can contact you.
Typical blister copper specification
Blister is the first metallic copper out of the converter, at about 98% to 99.5% Cu. Anode copper has been fire-refined further and cast into plates with lugs, ready to hang in an electrorefining cell.
Usually by drilling or sawing pieces from each lot under an agreed method, then assaying the samples at independent labs. The contract should name the method, the labs, the splitting limits and an umpire lab.
Most deals die on payment, not price. The structures that work in African copper, the ones that never do, and how to bridge the gap between test-first buyers and pay-first sellers.