The Dangers of Asbestos in Clay

Understanding What Asbestos Is

Asbestos is a hazardous mineral fiber that forms naturally in rock and soil. While it is now heavily regulated in the United States, between 2,500 and 3,000 people a year are still dying from mesothelioma. To this day, the only known cause of the rare cancer is asbestos exposure. So where is that exposure coming from? 

Clay Can Be Contaminated By Asbestos

Clay is a combination of several rocks, minerals, and natural compounds. Clay used for artwork is usually mixed with a mineral called talcum. The issue surrounding talcum, also called talc, is that it is frequently found in close proximity to asbestos. Thus, it is known for being contaminated with nearby asbestos. 

This asbestos contamination has historically made its way into clay, exposing artists who work with it. For this reason, many schools opt for talc-free clay to minimize the chance of exposure to staff and students.

Health Dangers of Asbestos Exposure from Clay

Unfortunately, it isn’t just mesothelioma that asbestos in clay is linked to. The deadly fiber has been associated with ovarian cancer, pulmonary disease, lung cancer, and asbestosis, which is a long-term and severe lung disease. This puts those who work with clay at risk for a multitude of life-threatening chronic conditions. 

The History of Asbestos in Clay

Asbestos in clay dates back to over 750,000 years ago. Artifacts indicate people of Finland in 250,000 B.C. embedded asbestos into their clay pots and vessels to strengthen them and make them flame resistant. 

Stone Age ceramic pots and vessels made with asbestos fibers

This style of pottery became known as asbestos ceramics. Remnants of these asbestos-tempered ceramics were found later in Scandinavia, indicating distribution from Finland. 

As researchers studied a Byzantine monk painting from the 12th century, they were shocked to learn the art was created using asbestos. The hazardous fiber was used in art ranging from tablecloths to purses in the 1700s. Even Benjamin Franklin was an owner of an English asbestos purse, which can now be found in the Natural History Museum. 

Mining Asbestos in the Mid-Nineteenth Century

Thetford Mines in Quebec Canada became one of the largest sources of asbestos in the world in 1876. Large deposits of the mineral were mined for navy ships. But a great deal of it also went towards artist’s clay. Today, at Thetford Mines, there are a variety of asbestos sculptures and artifacts being safely preserved.

Regions That Still Use Asbestos Today

While the popular belief is that asbestos is banned in the United States today, the truth is that it is still legal, but heavily regulated. The mineral can also still be found in products in Russia and in parts of Asia. Belarus, India, Kazakhstan, Syria, and Zimbabwe all declined proposed country-wide bans on asbestos. For artists looking for sources of clay, it is best to avoid purchasing from these regions due to possible contamination. 

Asbestos can be difficult to detect in clay and other materials.

Viewing asbestos often requires the use of a microscope, but there are a few distinguishable visual properties of clay contaminated with asbestos. The fiber can appear white and fuzzy and resembles fabric fiber. 

Health Risks of Asbestos Exposure from Clay

Most people already know the link between mesothelioma and asbestos. But the list of health risks associated with asbestos exposure is much longer than one may think. 

Asbestos-Related Illnesses from Asbestos-Contaminated Clay

The following are the possible asbestos-related diseases caused by asbestos in clay:

  • Lung cancer
  • Ovarian cancer
  • Laryngeal cancer
  • Pharyngeal cancer
  • Stomach cancer
  • Colon cancer
  • Hyaline pleural plaques
  • Asbestosis
  • Pleural thickening
  • Pleural effusion
  • Atelectasis

Friable vs Non-Friable Asbestos

Friable asbestos refers to a form of asbestos that can be reduced to powder under simple pressure, while a fiber that cannot be reduced in this way is considered a non-friable asbestos

Examples of friable asbestos include popcorn ceilings, asbestos used in insulation, heat-resistant fabrics, and damaged asbestos cement products. This is the more hazardous type of asbestos, as it can be more easily released into the air and inhaled or swallowed. 

Non-friable asbestos (like intact vinyl sheet flooring) is not considered as threatening to human health. However, under enough pressure, a non-friable asbestos can also become one that is friable. Sanding or crushing can oftentimes produce this change.

What to Do with Clay That May be Contaminated with Asbestos?

Anyone who believes the clay they have may be contaminated with talcum, or if it was made sometime before the last ten years, it can be sent in for asbestos testing. Lab results will reveal whether asbestos is detected. Even without lab testing, it is best to avoid using older clay. 

Research now suggests that using pre-mixed clay, rather than dry clay mixed with water, can help to minimize risk of exposure. And the bottom line is – it’s better to be safe than sorry!

AsbestosClaims.Law

AsbestosClaims.law is your comprehensive resource for all things asbestos. We hope this information helps you.

If you believe that your home was contaminated with asbestos, you could be entitled to significant compensation—money you could use to cover the costs of asbestos removal services, pay for medical treatment, and preemptively protect your physical well-being. 

In addition to legal claims, veterans disability, social security and employment protection like workers compensation, FELA and The Jones Act for maritime workers, there are asbestos trusts that have been set up to compensate those harmed by asbestos without having to file a lawsuit.
If you have any additional questions or concerns related to asbestos, including testing for exposure or how to file a claim, please get in touch by email at [email protected], or call or text us at (833) 4-ASBESTOS (427-2378) or (206) 455-9190.

Additional Sources:

“Asbestos in the Home.” U.S. Consumer Product Safety Commission, https://www.cpsc.gov/safety-education/safety-guides/home/asbestos-home.
Aprilholloway. “Byzantine Monks Used Asbestos in Wall Paintings Centuries before Industrial Revolution.” Ancient Origins, Ancient Origins, 1 Apr. 2014, https://www.ancient-origins.net/news-general/byzantine-monks-used-asbestos-wall-paintings-centuries-industrial-revolution-001515.
King, Daniel. “The History of Asbestos – Importing, Exporting & Worldwide Use.” Mesothelioma Center – Vital Services for Cancer Patients & Families, 24 May 2022, https://www.asbestos.com/asbestos/history.
Pira E, Donato F, Maida L, Discalzi G. Exposure to asbestos: past, present and future. Journal of Thoracic Disease. 2018 Jan;10(Suppl 2):S237-S245. doi: 10.21037/jtd.2017.10.126. PMID: 29507791; PMCID: PMC5830559.