PIA/GATF RHEM Light Indicator (2-Pack)

RHEM Light Indicator   The PIA/GATF RHEM Light Indicator is a tool for the visual control of color viewing. This adhesive patch can be attached to the border of color proofs, copy, reproductions, or the press sheet. The Light Indicator uses metamerism to “change color” and alert the viewer if the light source is not 5000°K, the graphic arts lighting standard.   Under a 5000°K standard light source, stripes do not appear. Stripes appear when the RHEM Light Indicator is viewed under nonstandard light sources, such as incandescent and fluorescent light (see simulation).   RHEM Light Indicators are sold as 2-packs. 2-packs consist of 2 books of 50 stickers each (total 100 stickers). Each sticker measures 2.0 x 0.75 inches (51 x 19 mm).