Why does copper quality in a cable directly affect the scrap price?
When you bring cables to a scrap yard, the price you receive depends on two things: the current copper quotations on the London Metal Exchange (LME) and the actual quality of the material you are selling. The copper cable scrap market is not a single uniform market – the industry uses precise quality categories that allow goods to be valued objectively and consistently. If you know which category your cables belong to, you can negotiate with more confidence and avoid a situation where you receive the price for a lower-grade material even though you have something valuable to sell.
Three main quality categories of cable copper
In the Polish and European cable scrap industry, there are three basic classes of copper recovered from cables and wires. Each corresponds to a different degree of purity and requires a different amount of processing during recycling, which directly affects the price list for copper and aluminium cable scrap.
1. Milberry – highest-purity copper
Milberry is a colloquial, widely used industry term for unoxidised copper that is free of coatings and contaminants, with a purity of at least 99.9% Cu. In the context of cables and wires, this refers primarily to copper wires and conductors completely free of insulation, with no trace of lacquer, enamel or other coatings, and with a characteristic bright pink, shiny appearance.
Where does such copper come from? Most commonly from precisely processed electrical conductors, fresh production waste from factories, or cables that have been stripped by hand or machine, leaving a clean bare wire. Milberry achieves the highest scrap prices – close to exchange quotations with minimal deduction. If you have large quantities of this material to sell, it is worth using the online quote / valuation request option to receive an individual price offer.
2. Enamelled / Flash Copper – copper with traces of coating or slight oxidation
This category sits slightly lower in the hierarchy, but is still highly sought after at copper scrap yards. It covers copper wire that may have a thin layer of enamel (so-called enamelled wire), lacquer, or minor surface discolouration caused by oxidation, while the core itself remains clean and intact.
Typical sources include windings from electric motors, transformers, coils and converters – anywhere that winding wire with a lacquer coating is used. The scrap price for this category is lower than for Milberry, because smelting such material requires burning off or mechanically removing the coating and possibly deoxidising the copper, which generates weight losses and additional processing costs at the smelter.
3. Birch Copper (also: mixed copper, No. 2 Copper)
Birch copper is the broadest and most varied category. It includes all types of insulated cables and wires, connectors, terminals and mixed cross-sections – in short, everything that is not clean, uncoated wire. The insulation may be PVC, rubber, polyethylene or other materials. Importantly, the copper content relative to total weight can vary significantly – from as little as a few percent in the case of thick power cables to over 50–60% in thin control or installation cables.
That is precisely why, when buying insulated cables, establishing the so-called yield factor is crucial – how much actual copper is hidden beneath the sheathing. The thicker the conductors and the thinner the insulation, the higher the yield and the better the price. Cable scrap in this category is purchased with this factor taken into account, so it is worth arriving with different fractions sorted separately rather than mixed together.
How to assess copper quality yourself before visiting a scrap yard
You do not need to be a metallurgist to make a preliminary assessment of the material you want to sell. A few simple observations can help you:
- Colour of the exposed cross-section – clean, unoxidised copper has a bright pink, almost salmon colour. Dark brown or greenish discolouration is a sign of oxidation or moisture – it lowers the material's category.
- Presence of insulation – an insulated cable will always fall into the birch copper category, regardless of how clean the conductors inside are. If you can remove the insulation (e.g. when dealing with larger quantities of uniform cables), you will get a better price.
- Coatings and lacquers – enamelled or lacquered wire is immediately recognisable: it is matt or has a clearly uniform coating layer. Such material qualifies as enamelled/flash copper, not Milberry.
- Cross-section and cable construction – cables with thick single-strand conductors yield proportionally more copper at the scrap yard than multi-strand fine-wire cables surrounded by thick sheathing.
- Weight and twist – a heavy cable with a relatively small outer diameter suggests a high copper content. A light, soft cable often means a lot of insulation and little metal.
How sorting affects the price – practical tips
One of the simplest ways to obtain a better valuation is to pre-sort your material before delivering it to the scrap yard. Mixing insulated cables with clean copper wire results in the entire load being priced according to the lowest category. Separating even just the clean wire from sheathed cables can mean a difference of several dozen groszy per kilogram – and with larger quantities, that adds up to a significant sum.
Construction companies, electricians, manufacturing plants and entrepreneurs from the Greater Poland region who regularly collect cable waste can arrange for collection directly from the point of generation. EURO-SCRAP serves customers including through cable scrap collection in Tarnowo Podgórne and cable scrap collection in Mosina – logistics does not have to be an obstacle.
Documentation and weighing – what you should know
When selling cable scrap to a professional scrap yard, the transaction is documented in accordance with applicable regulations. A scrap yard operating in compliance with the Waste Act holds a BDO registration number and issues the seller with a proper waste acceptance confirmation. Weighing is carried out on a certified scale – you have the right to see the measurement result and receive a printout. This is the standard minimum that protects both parties to the transaction.
If you want to check current rates before coming in, you can visit the copper scrap price list or get in touch directly – prices change in line with exchange quotations, so the current valuation always takes precedence over last week's figures.
Summary – knowing the categories is a real financial advantage
Milberry, enamelled copper, birch copper – these are not terms reserved exclusively for specialists. Anyone who sells copper cables regularly or occasionally should know these basic categories, because they directly determine how much money ends up in their pocket. Clean, unoxidised bare copper wire is always a better offer than mixed cable scrap – and the scrap yard will price it accordingly. Knowing what you have in your hands is the simplest way to avoid unnecessary losses when selling.
