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Momenteel, many daily necessities are made of materials such as copper, ijzer, roestvrij staal, enz. Deze materialen bevatten zware metalen elementen, which may cause excessive standards if not handled properly.

Bijvoorbeeld, the main element of stainless steel contains manganese, chroom, en nikkel. To maintain corrosion resistance, roestvrij staal moet een bepaalde hoeveelheid chroom bevatten. If the chromium is not handled properly, it may lead to excessive chromium. Similarly, improper handling of manganese may result in excessive manganese.

The copper alloy used to make the faucet contains trace amounts of metal elements such as iron, aluminium, en leiden. Als er geen leiding is, het is moeilijk te vormen tijdens het gieten. Hoe hoger het loodgehalte, the easier the casting process is. Daarom, the copper faucet on the market generally contains a certain amount of lead. If the lead-free process is not done well when the factory is manufactured, it will lead to excessive lead.

Een andere reden is dat de technologie en apparatuur van het bedrijf verouderen, resulting in the control of trace elements. Gebruikelijk, wanneer de nieuwe apparatuur voor het eerst in productie wordt genomen, zijn producten zijn gekwalificeerd, maar wanneer de apparatuur lange tijd wordt gebruikt, the trace elements of the product will exceed the standard. This situation cannot be repaired from a technical point of view, and only new equipment can be replaced. Echter, some factories continue to use it in order to save money. This is a technical problem and a cost issue.

A bathroom equipment seller told reporters that most of the faucets on the market today are copper cores, but the quality is not good. Small manufacturers, cheap faucets, the possibility of lead exceeding the standard is very large. Dit komt doordat sommige fabrikanten geen standaard messinglegeringen kopen om de kosten onder controle te houden, but purchase cheap lead brass from small workshops as raw materials. This lead brass is often high in lead but at half the price of brass alloy.

Hoe inferieure kranen te onderscheiden van de prijs? Some insiders told reporters that a copper faucet with a formal process should cost more than 100 yuan, while tens of faucets are likely to use lead brass.

“Vergeleken met grote producten, tens of dollars of faucets are really not worth spending so much time and energy to pick one by one, en zal geen aandacht besteden aan het probleem van overmatig loodgehalte.” A Shanghai resident who is renovating at home told reporters.

In dit opzicht, some insiders said that domestic consumers pay insufficient attention to the quality and safety of faucets, which also makes many unqualified inferior faucets have opportunities.