Lead: less than 1,000ppm, less than 2,500ppm in steel alloys, less than 4,000ppm in aluminum alloys, and less than 40,000ppm in copper alloys.
The "Measures for the Administration of the Prevention and Control of Pollution from Electronic Information Products" stipulates that since July 1, 2006, the electronic information products included in the catalog of the priorities for the prevention and control of pollution of electronic information products must not contain lead, mercury Cadmium, hexavalent chromium, polymerized brominated biphenyl ether and polymerized biphenyl and other toxic and hazardous substances.
The upper limit concentration of the six hazardous substances in RoHS:
Cadmium: less than 100ppm;
Mercury: less than 1000ppm;
Hexavalent chromium: less than 1000ppm;
Polybrominated biphenyls (PBB): less than 1000ppm;
Polybrominated biphenyls (PBB): less than 1000ppm;
Polybrominated biphenyls (PBB): less than 1000ppm;
Polybrominated biphenyl ethers (PBDE): less than 1000ppm. 1000ppm.
Expanded Information
Reasons for Lead Exceeding the Standard
1, Industrial Pollution
With China's urbanization and industrialization, environmental pollution is becoming more and more serious, of which lead is the main source of pollution.
2, leaded gasoline exhaust pollution
Tetraethyl lead is used as an anti-explosive agent in the traditional gasoline production process. This gasoline combustion from the exhaust of lead particles, one-third of the large particles of lead quickly deposited in the ground on both sides of the road within a few kilometers of the area (soil and crops) The remaining two-thirds of the aerosol state suspended in the atmosphere, and then with the respiration into the human body. The link between leaded gasoline and lead poisoning in children is fairly well established.
3, school supplies and toys
It is understood that each page of colorful images of newspapers, containing up to 2,000 micrograms of lead, 60% of domestic toys in the surface paint containing soluble lead has exceeded the international maximum allowable amount of lead, the highest lead-containing more than 6 times, 36.7% exceeded the standard by 37 times: textbooks with colorful covers exceeded the standard by 14 times, children's colored pencils also have more than 10 times lead contamination.
4, food
For example, popcorn is a favorite food for children. As the body of the popcorn machine is made of lead-containing alloy, so that the popcorn contains a high amount of lead. The traditional production process of leather eggs (puffed eggs) uses lead oxide as a food additive, so leather eggs also contain high levels of lead. Therefore, children and their parents should be educated to avoid eating these foods as much as possible and to improve the traditional process to reduce the lead content.
5, other
In our lives, lead pollution is everywhere, in addition to the atmosphere and water lead pollution, ceramics, paint, cosmetics, hair dyes, batteries and other lead pollution.
Baidu Encyclopedia-Lead Excess
Baidu Encyclopedia-Environmental Certification