However, the radiation received when using glassware – even canary or vaseline glass – is unlikely to exceed background radiation levels. Even ordinary glass can contain high-enough levels of potassium-40 or thorium-232 to be detectable with a survey instrument. In part, collectors like uranium glass for the attractive glow that is produced when the glass is exposed to a black light. Such uranium-containing glass is often referred to as canary or vaseline glass. Glass: glassware, especially antique glassware with a yellow or greenish color, can contain easily detectable quantities of uranium.However, some older dishware (e.g., pre-1972 Fiesta®ware) can have radioactivity exceeding background levels to minimize health risks, you may not want to use these pieces for eating or drinking. Unless there is a large quantity of the material, the amount of radioactivity in these products is unlikely to be greater than natural background levels. In many cases, the activity is concentrated in the glaze. Ceramics: ceramic materials such as tiles and pottery may contain elevated levels of naturally-occurring uranium, thorium, and/or potassium.You can learn more about performance standards for these devices from the Food and Drug Administration (FDA). In fact, warning labels are required which begin "DANGER-Ultraviolet radiation".
Radium paint skin#
Sun lamps and tanning salons: the ultraviolet rays from sun lamps and tanning salons are as damaging to skin as the ultraviolet rays of the sun.X-ray emissions from CRT monitors are not recognized as a significant health risk. Older televisions and computer monitors that contain CRTs may emit x-rays. Televisions and monitors: Flat-screen televisions and monitors (e.g., LCD, OLED, plasma) do not use cathode ray tubes (CRTs) and therefore do not produce ionizing radiation.Unless gas lantern mantels are used as the primary light source, radiation exposure from thorium lantern mantles is not considered to have significant health impacts. Gas lantern mantles: older, and some imported, gas lantern mantles generate light by heating thorium (primarily thorium-232).The health risk from using older camera lenses is low the radiation received when using a thoriated lens camera is approximately equal to natural background. Older camera lenses: some camera lenses from the 1950s-1970s incorporated thorium into the glass, allowing for a high refractive index while maintaining a low dispersion.Learn more about tritium and radium on the Radionuclides webpage. Avoid opening these items because the radium could flake off and be ingested or inhaled. Older watches and clocks (made before 1970) may contain radium-226 paint on dials and numbers to make them visible in the dark. Clocks and watches: some luminous watches and clocks contain a small quantity of hydrogen-3 (tritium) or promethium-147.
For more information on smoke detectors, visit Americium in Ionization Smoke Detectors. Unless tampered with, smoke detectors pose little to no health risk a smoke detector’s ability to save lives far outweighs the health risks from the radioactive materials.
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