The art world is no stranger to unexpected conservation challenges, but our recent case study at LCS Laboratory underscores a risk that many professionals still overlook: loose asbestos dust on historical art objects.
During routine testing for a private collection, our laboratory detected high concentrations of asbestos on a mid‑20th‑century folk art object. The discovery was surprising but not unprecedented. Archival research and industry knowledge suggest that asbestos‑containing plaster and modeling compounds were commercially sold as art media throughout North America—and likely internationally—well into the 20th century. These materials were marketed for their durability, texture, and ease of use, with little awareness of the long‑term health implications.
Today, these objects are aging. Their surfaces may shed dust. And when they are displayed, handled, or transported, that dust can become airborne.
For collectors, curators, and museum staff, this raises an important question: How do we ensure that the art we steward does not inadvertently expose the public—or staff—to asbestos?
Why Asbestos in Art Matters
Asbestos is a regulated hazardous material. While intact, encapsulated asbestos poses minimal risk, friable or loose asbestos dust can be inhaled and accumulate in the lungs. Over time, exposure increases the risk of serious health conditions.
For art professionals, the concern is not only conservation—it’s public safety.
Objects displayed in galleries, handled in storage, or loaned for exhibitions may release microscopic fibers if their surfaces contain deteriorating asbestos‑based media.
Regulations vary by province and state, but Ontario’s threshold of 0.5% asbestos content is a commonly referenced benchmark. Below this level, the material is generally considered low‑risk under normal handling and display conditions. Above it, mitigation or controlled handling may be required.
A Non‑Destructive Approach to Asbestos Detection
Recognizing the need for safe, non‑invasive testing, LCS Laboratory offers a non‑destructive surface dust analysis specifically suited for historical and cultural objects.
This method focuses on friable or loose dust—the material most likely to become airborne and pose a risk.
How to Collect a Sample Safely
Before collecting a sample, confirm that gentle wiping will not damage the object’s surface. If in doubt, consult a conservator.
To collect dust for asbestos testing:
- Use cotton wipes or pharmaceutical‑grade alcohol pads.
These effectively lift loose particulate matter without harming most surfaces. - Gently wipe a small area of the object.
Only a few milligrams of dust are needed—about ¼ of a grain of rice. - Place the wipe in a clean, sealed ziplock bag.
Label it clearly with the object ID and sampling location. - Ship the sample to LCS Laboratory along with the completed request form.
Our laboratory extracts mineral particles from the wipe and analyzes them for asbestos content using validated analytical methods.
Interpreting the Results
If the concentration of asbestos in the collected dust is below 0.5% (Ontario Regulation), the likelihood of harmful exposure during normal storage or exhibition is low. If levels exceed regulatory thresholds, you may need to consider:
- Controlled handling procedures
- Restricted access
- Conservation treatment
- Encapsulation or stabilization
- Specialized cleaning
- Consultation with occupational health professionals
Early detection empowers institutions to make informed decisions that protect both the public and the integrity of the artwork.
Protecting Collections—and People
Asbestos in 19th‑ and 20th‑century art is an under‑recognized issue, but one that deserves attention. With aging materials and increased public engagement, the risk of loose asbestos dust should be part of every collection manager’s preventive conservation strategy.
If you suspect that an object may contain asbestos‑based media—or if you simply want peace of mind—LCS Laboratory is here to help. Our non‑destructive testing service provides clarity without compromising the artwork. To discuss your project or request testing, please contact LCS Laboratory.
