Nykyisessä, many daily necessities are made of copper, rauta, stainless steel and other materials. Nämä materiaalit sisältävät raskasmetallielementtejä. If they are not handled properly, they may exceed the standard.

Esimerkiksi, the main elements of stainless steel include manganese, kromi, ja nikkeliä. In order to maintain corrosion resistance, ruostumattoman teräksen tulee sisältää tietty määrä kromia. If the chromium is handled improperly, it may cause excessive chromium. In the same way, improper handling of manganese may lead to excessive manganese.

The copper alloy used to make faucets contains traces of metal elements such as iron, alumiini, ja johtaa. Jos lyijyä ei ole, sitä on vaikea muodostaa valun aikana. Mitä suurempi lyijypitoisuus, the easier the casting process. Siksi, copper faucets on the market generally contain a certain amount of lead. If the factory does not do a good job of removing lead during manufacturing, it will cause excessive lead.

Toinen syy on yrityksen teknologian ja laitteiden ikääntyminen, causing trace elements to be uncontrollable. Yleensä, kun uudet laitteet otetaan ensimmäistä kertaa tuotantoon, sen tuotteet ovat päteviä, mutta kun laitetta käytetään pitkään, the products will exceed the trace elements. This situation cannot be repaired from a technical point of view and can only be replaced with new equipment. kuitenkin, some factories continue to use them in order to save money. This is a technical and cost issue.

A seller of bathroom equipment told reporters that most faucets on the market now have copper cores, but the quality varies. Faucets from small manufacturers and cheaper prices are likely to exceed the lead. Tämä johtuu siitä, että jotkin valmistajat eivät osta tavallisia messingiseoksia hallitakseen kustannuksia, but purchase cheap lead brass as raw materials from small workshops. This kind of lead brass tends to have a high lead content, but the price is only half of the brass alloy.

Kuinka erottaa huonolaatuiset hanat hinnasta? An industry insider told reporters that a copper faucet with formal craftsmanship should cost more than one hundred yuan, while a faucet worth tens of yuan is likely to use lead brass.

“Verrattuna suuriin tuotteisiin, faucets worth tens of yuan are really not worth spending so much time and energy to choose one by one, eikä kiinnitä huomiota liiallisen lyijysisällön ongelmaan.” A Shanghai citizen who is decorating his home told reporters.

Tässä suhteessa, some people in the industry said that domestic consumers did not pay enough attention to the quality and safety of faucets, which also gave many unqualified and low-quality faucets an opportunity.