Paint knowledge: why is there "lead" in paint formula?

Core tip: the use of lead in daily necessities dates back to ancient Rome The Romans added lead to cosmetics and as an additive to food and wine, pewter utensils and other items, including pigments Throughout the Roman Empire, this cheap metal was even used in water pipes Lead has been used since ancient Rome No wonder no one thinks about why lead should be added to the paint Why do manufacturers add lead, a heavy metal, to pigments? What is its function? In pigments, different lead compounds are added as pigments, and the color depends on what kind of pigments people add Shenyang steel structure fireproof coating construction expert punde Building Fire Engineering Co., Ltd Recommended introduction: since its establishment, Shenyang punde Construction Fire Engineering Co., Ltd has cultivated a group of professional construction teams with excellent equipment, rich experience and serious responsibility with advanced and scientific management methods and strict engineering quality assurance and after-sales service system It has undertaken a number of fire system installation projects, which has been praised by customers Every idea and special requirement of you will be fully considered by us and fully realized in the construction technology, which will become the cornerstone of our successful long-term development We are looking forward to your invitation, to provide you with quality services and high-quality technical support! All construction coatings have passed ISO9001 Paint Home News: the use of lead in daily necessities dates back to ancient Rome The Romans added lead to cosmetics and as an additive to food and wine, pewter utensils and other items, including pigments Throughout the Roman Empire, this cheap metal was even used in water pipes Lead has been used since ancient Rome No wonder no one thinks about why lead should be added to the paint Why do manufacturers add lead as a heavy metal to pigments? What is its function? In pigments, different lead compounds are added as pigments, and the color depends on which lead compounds people add For example, lead carbonate (also known as white lead) can form white or milky white pigments, while lead tetroxide (also known as red lead) can form bright red pigments Lead, a heavy metal additive, also reduces the time it takes for pigments to dry, making them more durable and moisture resistant These characteristics of lead make those lead coatings become the most ideal coatings for household, metal and even children's toys Of course, although lead paint is very durable, but their biggest disadvantage is lead Exposure to heavy metals can cause many health problems in human body Excessive lead content in human body will lead to convulsion, coma and death If trace lead in human body, it will also cause damage to human nervous system, brain, blood cells and kidney Infants and children are most vulnerable to lead poisoning, which can hinder their physical and mental development, cause behavioral problems and low IQ In view of the above, the U.S government banned the use of most lead based coatings in 1978 However, lead paint can still be used for house decoration, but the U.S government requires that the lead content of household lead paint must be less than 9 / 100000 Lead paint was very popular before 1978, so many houses built before then used lead paint What the EPA didn't specify was that a good lead based coating would not cause harm Only after the lead paint is damaged (such as peeling, being wiped off or during decoration), the lead dust produced by it will bring damage to people's body [focus on WeChat official account "paint net"; pay attention to surprises; scan code to see what the paint sales are Great! 》Paint home is specialized in coating, diatom mud, paint coating, coating process, news information and coating of fireproof coating, diatom mud, paint coating, coating process, decoration knowledge and decoration effect map of fireproof coating,