When Marie and Pierre Curie discovered radium in 1898, the world treated it like a gift. Radium glowed, it felt powerful, and early science suggested it had medical uses. Within years, it was being added to drinking water, toothpaste, and cosmetics. Manufacturers marketed it as a cure for everything from arthritis to cancer. The public had no reason to doubt them. Radium was new, it was exciting, and experts called it safe.
Radium-infused products flooded the market on both sides of the Atlantic. In Paris, a cosmetic line called Tho-Radia became wildly popular after a Dr. Alfred Curie — no relation to Marie Curie — put his name behind it. The Curie name alone convinced many French women that radioactive makeup was fashionable and healthy. That trend quickly crossed over to America.
Some products didn’t even contain radium but marketed themselves as though they did. Fraudulent claims about radioactivity appeared on packaging to cash in on the craze. Consumers had no way to verify the science behind any of it.
One real-world application of radium was its use in luminous paint. Its glow made it ideal for watch dials, clock faces, and military instrument panels that soldiers needed to read in complete darkness. The U.S. Radium Corporation developed a paint called Undark for exactly this purpose. During World War I, demand for luminous dials surged, and the company hired hundreds of young women to hand-paint them.
The job was considered desirable. It paid well and had a certain glamour to it. The factories employed mostly working-class women who were glad for the steady income. They sat at long tables, applying tiny strokes of luminous paint to watch dials with fine-tipped brushes.
To keep the brush tip precise, the women were taught a technique called lip pointing — placing the brush tip between their lips to shape it before dipping it back into the radium paint. Supervisors trained them to do this. They did it dozens of times per day, ingesting small amounts of radium with every stroke.
The factory owners knew radium was dangerous. Scientists on site wore lead aprons, used tongs to handle radioactive materials, and placed lead screens between themselves and the paint. The women on the factory floor received none of these protections and were told the paint was completely harmless. Some of them painted their nails, teeth, and faces with it for fun after their shifts, glowing as they walked home.
Radium behaves like calcium once it enters the body. The bones absorb it, and it begins destroying tissue from the inside. The first warning signs appeared at the dentist’s office. Young women came in with toothaches, loose teeth, and jaw pain. When teeth were pulled, the wounds refused to heal. Ulcers formed. Bone began to rot. The condition became known as radium jaw — the jawbone literally decayed and crumbled. Some women suffered bone fractures from minor movements. Others developed severe anemia and abscesses throughout their bodies. Radiation exposure also suppressed menstruation and caused sterility.
The corporation denied responsibility. Finding a lawyer willing to take on a powerful industrial company proved nearly impossible. Grace Fryer, one of the dial painters, spent two years searching before she found legal representation. In 1927, she and four other women filed a lawsuit against the U.S. Radium Corporation. Together, they were called the Radium Girls.
The case went to court in January 1928. By that point, the women’s conditions had deteriorated severely. Some were bedridden. None of them could lift their arms high enough to take the oath when they testified. The public watched closely. Newspapers covered the trial in detail, and readers across the country sympathized with the women fighting from their sickbeds against a corporation that had knowingly put them in danger.
The trial drew national attention, and some of the women’s deteriorating health was documented as they appeared in court. The physical toll radium had taken on their bodies was visible and undeniable.
Coverage of the dying women spread through newspapers nationwide. Reporters detailed the human cost of the corporation’s negligence in stark terms.
Before the case reached the jury, the company settled in the autumn of 1928. Each woman received $10,000 — equivalent to roughly $177,000 today. They were also awarded an annual payment of $600 (about $10,600 today) and $12 per week for the rest of their lives, along with coverage of all medical and legal costs. The settlement was a legal victory, but every woman who signed it already carried the damage inside her bones.
The watches these women painted still glow today. Radium has a half-life of 1,600 years, meaning the dials hold nearly the same radioactive charge they did when they left the factory floor. The women who painted them did not live nearly as long. Many died from the effects of radium poisoning in the years following the settlement. Their employer had known what radium did to the human body — and said nothing.
