Capabilities

We provide testing services to certify product and materials compliance, support quality control, and ensure the health and safety of workers and their environment. We provide assistance for clients who are not sure what tests they need. Our accredited materials characterization laboratory is the foundation of all the services of RJ Lee Group provides, including standardized testing for compliance, industrial hygiene and environmental analyses, quality control, and materials research and development.

We provide credentialed expertise supported built by robust scientific data. We provide significant support to industrial clients for product development, industrial hygiene and overall production support.

RJ Lee Group maintains a visible and respected reputation within the legal community, having offered scientific support in civil litigation matters for nearly 30 years. 

  • Product Liability 
  • Toxic Tort
  • Construction Defect
  • Fugitive Emission
  • Personal Injury
  • Patent Infringement
  • Contract Disputes
  • Insurance Subrogation

Subject Matter Experts

From our core business of providing scientific solutions to our clients, we have developed innovative products. Some are produced internally, and some have arisen from partnerships with other research organizations. 

For example, we build lab software solutions to help manage and streamline your labs data, and environmental testing products for a variety of applications. 

  • IntelliSEM is a powerful automated particle analysis system.
  • ParticleID is  a customizable cloud hosted web application used to identify foreign particulate matter and  assist with root cause investigations. 

Other products we create count particles and help keep the air and environment safe.

RJ Lee Group is a materials analysis laboratory and consulting company which serves many different industries. We offer scientific solutions such as industrial forensics services, laboratory and testing services, litigation support, and laboratory software to many industries:

Uncovering an Art Treasure’s Hidden Secret

RJ Lee Group News

May 15, 2013

An art collector, who owned a painting purchased by a family member from an art gallery in Europe just before the German invasion of Paris, contacted RJ Lee Group to determine when the painting had been created. The painting was signed by a well-known early 20th century artist and was true to the artist’s style, but it was not listed in the artist’s portfolio of known works. The owner wanted to determine if the painting could be the work of this artist based on its age. Our mission was to establish a timeframe in which the painting could have been created by investigating the pigments and other materials used and examining the construction of the painting.

The Perfect White

Throughout the years, artists have been known to prepare or repurpose canvases by “grounding” them or applying a preparation layer of primer to them, to prevent absorption of paint into the canvas. Since World War II, the preferred primer has been titanium (Ti) (anatase or rutile), called titanium white, because of its covering power, brightness, very high refractive index, opaqueness and because it is non-toxic. As we examined the painting, this underlying or grounding layer could be seen through cracks in the painting’s background. To determine the exact method used to prepare the canvas, we enlisted the aid of local painting conservator, Ms. Rikke Foulke of Foulke Fine Art Conservation LLC. By examining the painting’s construction, she was able to establish that our canvas was not commercially prepared, but that the white layer had been applied by the artist. Having uncovered this fact, we now needed to assess the age of the canvas by determining if titanium white was present in the grounding layer. Since the artist died before titanium white was commercially used as a pigment, the absence of this pigment would be a factor in determining the age of the painting.

Non-Destructive Investigative Techniques

RJ Lee Group scientists used two non-destructive, independent analytical techniques to determine the presence of titanium: X-ray fluorescence (XRF) and Raman spectroscopy. The portable XRF uses x-rays to determine the presence and amount of elemental titanium, while the portable Raman uses laser light to determine which form (anatase or rutile) of titanium dioxide (TiO2) is present.

We conducted XRF analyses at 10 locations on the painting using the same parameters and conditions. Each analysis was two minutes in length. The spectra and raw data were saved to the portable XRF after each analysis and later downloaded to a computer for review. Using that data, we determined that titanium was not present at any of the locations evaluated.

Raman spectroscopy provides a distinct chemical fingerprint for each molecule or material and can be used to very quickly identify it or distinguish it from others. Our Raman included a library of more than 7,000 spectra for identification of unknown compounds. We collected spectra for each of six spectral locations and none of the collected spectra matched either form of titanium dioxide.

Industrial Forensics Provides Conclusive Evidence

By combining complementary scientific techniques with the observations of a skilled art conservator, we were able to prove conclusively that the underlying grounding layer of the painting did not contain titanium or titanium dioxide. Upon examining our results, Ms. Foulke concluded, “The findings of the scientists at the RJ Lee Group, that no titanium was found to be present (in the painting), confirms for me that the work was made before titanium white was introduced to artists as a pigment. The appearance of the painting and the aging of the materials are consistent with other paintings I have studied from the first quarter of the 20th century.” Our industrial forensics approach using both scientific results and visual observations confirmed that the painting was created during the lifetime of the presumed artist.

Related Posts

PTR-MS and Indoor Air Research

PTR-MS and Indoor Air Research

Indoor air quality research continues to grow substantially over the last several years. Most research prior to the 2010’s was focused on outdoor...