fadometer

English

Etymology

From fade +‎ -ometer.

Noun

fadometer (plural fadometers)

1. A device that irradiates materials in order to test the degree to which they fade from exposure to sunlight.
   • 1930, Technical Association of the Pulp and Paper Industry, Technical Association Papers - Volume 13, page 75:

     We also tried the fadometer and found it graded in between. Taking that same example — between 70 and 21 to the ultra-violet light — it was 70 and 45 to the fadometer.

   • 1936, The Journal of the American Leather Chemists Association:

     The use of a fadometer is to be recommended, but because of its limited use in the average leather laboratory the adoption of the ordinary exposure test is considered best.

   • 1940 August 19, “River Rouge”, in LIFE, volume 9, number 8, page 45:

     A hundred hours in the fadometer equals half a year in Florida sunshine.

   • 1957, Milton Jacobs, Fabrics and Fibers for Passenger Cars:

     Essentially, these consisted of placing fabric swatches under the light of the Florida sun or of a fadometer, and then examining them to determine the degree of fade.