Lead was one of the most widely used materials in human history, showing up in everything from plumbing and cosmetics to food, fuel, and paint. Its popularity came down to a handful of practical properties: it melts at a low temperature, resists corrosion, blocks water, and is soft enough to shape by hand. It was also cheap and abundant. These qualities made lead the go-to material for thousands of years, long before anyone fully understood how toxic it was.
Plumbing in Ancient Rome
The Romans were among the earliest civilizations to use lead on a massive scale. They built elaborate networks of lead pipes, called fistulae, to move water from aqueducts into homes, public baths, and fountains. Soil samples from the ancient harbor of Rome suggest lead pipes were installed around 200 B.C.E., roughly 150 years earlier than the oldest archaeological evidence previously indicated. The word “plumbing” itself comes from the Latin word for lead, plumbum.
These pipes didn’t just carry water into buildings. Outflow from the system likely contaminated harbor water with lead, potentially poisoning fish and other sea life. The extent to which Roman lead plumbing contributed to widespread lead poisoning in the ancient world remains debated, but the infrastructure was enormous and lasted centuries.
A Sweetener in Food and Wine
Perhaps the most surprising historical use of lead was as a food additive. Roman cooks boiled grape juice in lead or copper vessels to produce a thick syrup called defrutum or sapa. The acetic acid in the juice reacted with the lead to form lead acetate, a compound sometimes called “sugar of lead” because of its sweet taste. This syrup was then used to sweeten and preserve wine, fruit, and sauces.
The practice was widespread and well documented. The Roman agricultural writer Cato gave directions for reducing grape must in a lead vessel over a slow fire. Columella described boiling it down by a quarter or a third. Pliny also recommended lead vessels for the process. The famous Roman cookbook author Apicius added defrutum to nearly a fifth of his sauce recipes to improve color and flavor. Historians believe these sauces and sweetened foods were actually a larger source of lead exposure for wealthy Romans than the pipes themselves, since the aristocracy consumed the most elaborate dishes.
Cosmetics and Skin Lightening
For centuries across multiple cultures, lead was a key ingredient in cosmetics, especially skin-whitening products. The ancient Greeks used a lead-based face powder called psimuthion. By the Renaissance, the most famous version was Venetian Ceruse, a paste made from white lead that women applied to their faces to achieve a pale complexion. Pale skin was considered a marker of high social status, since it signaled a life spent indoors rather than laboring in the sun.
Queen Elizabeth I of England was one of the most well-known users of Venetian Ceruse. She applied it heavily to cover smallpox scars, and some historians believe her long-term use contributed to blood poisoning that may have played a role in her death. The cosmetics visibly damaged the skin over time, creating a cycle where users needed ever-thicker layers to cover the deterioration underneath.
Paint for Homes and Buildings
Lead-based paint was standard in homes for most of the 20th century. Lead compounds gave paint excellent durability, faster drying times, and resistance to moisture, which made it especially popular for doors, window frames, and exterior walls. White lead in particular produced a bright, opaque finish that was hard to match with other pigments. Orange, red, and yellow paints also relied heavily on lead compounds to achieve vivid, long-lasting color.
The United States banned lead-based paint in housing in 1978, but any home built before that date may still contain it. When old lead paint cracks, peels, or is disturbed during renovation, it creates dust and chips that are particularly dangerous to young children. Lead exposure in children has been linked to learning disabilities, developmental delays, and lower IQ scores.
Gasoline Additive
Starting in 1923, the U.S. began adding a compound called tetraethyl lead to gasoline. The purpose was straightforward: it stopped engine knock, a damaging rattling sound caused by fuel igniting unevenly inside the engine. Lead boosted octane levels, allowing the development of more powerful, higher-compression engines. These engines proved critical during World War II and dominated the American automotive industry for decades afterward.
The search for an anti-knock additive had been intense. Iodine, aniline, selenium, and other substances were all tried and rejected before tetraethyl lead emerged as the winner. It worked well, but it meant that every car on the road was spraying fine lead particles into the air through its exhaust. Leaded gasoline remained standard in the U.S. until regulations began phasing it out in the 1970s, and it wasn’t fully banned for on-road vehicles until 1996.
Food Cans and Solder
For most of the canned food era, manufacturers sealed tin cans using lead solder along the seams. Lead’s low melting point and workability made it ideal for creating airtight seals quickly and cheaply. The problem was that acidic foods like tomatoes and citrus could cause lead to leach from the solder into the contents of the can over time.
The U.S. canned food industry voluntarily stopped using lead solder in 1991. Four years later, the FDA issued a final rule banning lead solder in all food cans sold in the country, including imported products.
Ceramic Glazes
Potters have used lead in ceramic glazes for thousands of years. Adding lead to a glaze lowers its melting point, making it easier to achieve a smooth, glassy finish at lower kiln temperatures. It also produces rich, vibrant colors. The technique was especially common in traditional earthenware, the type of pottery fired at relatively low temperatures.
The risk comes when the glaze isn’t fired properly. If the kiln temperature is too low or the firing time too short, the lead doesn’t fully fuse to the clay surface. When food or drink is stored in these improperly fired dishes, lead can leach out. The FDA has flagged several categories of pottery as higher risk: handmade pieces with crude or irregular shapes, antique ceramics, items bought from flea markets or street vendors, and brightly decorated pieces in orange, red, or yellow, since lead is often used with those pigments to intensify their color.
Printing and Movable Type
When Johannes Gutenberg developed the printing press in the mid-1400s, he cast his movable type from a metal alloy that included lead. Lead’s low melting point meant it could be melted and poured into letter molds quickly, and it held fine detail well once it cooled. The alloy, typically a mix of lead, tin, and antimony, became the standard material for printing type for over 500 years. Typesetters who worked with these lead letters daily, handling them by hand and breathing in fine particles, faced significant occupational exposure. The craft of typefounding and letterpress printing remained tied to lead right up until digital typesetting replaced it in the late 20th century.
Why Lead Persisted So Long
The thread connecting all of these uses is that lead simply outperformed available alternatives on nearly every practical measure. It was softer than other metals, melted at just 327°C (well below iron or copper), didn’t corrode when exposed to water or air, and was inexpensive to mine and process. For each application, from pipes to paint to gasoline, replacing lead meant finding something that worked just as well at a comparable cost. That took decades of regulatory pressure and technological development, which is why lead remained embedded in everyday life well into the late 1900s despite growing evidence of its toxicity dating back centuries.