Oddy test

However, though materials may be safe for building purposes, they may emit trace amounts of chemicals that can harm art objects over time.

[3] The container is sealed with a small amount of de-ionized water to maintain a high humidity, then heated at 60 degrees Celsius for 28 days.

If the metal coupons show no signs of corrosion, then the material is deemed suitable to be placed in and around art objects.

Whereas Andrew Oddy proposed to place each metal coupon in a separate glass container with the material to be tested, Bamberger et al.[4] proposed a "three-in-one" test, where all three metal coupons shared one container, simplifying the procedure.

One of the main issues with the Oddy test is that there is some subjectivity to the interpretation of the results,[6] since it is primarily a visual determination.