5000K色温测试纸D50色温测试纸PIA/GATF RHEM
GATF RHEM测色温对照表是用于观察光源是否标准的标贴，可以有效察觉照明设备是否影响产品或印品的外观颜色。
光源标贴显示一样的棕红色这是表示色温
5000K的标准光源。
如看见光源标贴有两条呈现深棕色，这表示色温较低，如
2600K的偏黄光源。
如看见光源标贴有三条呈现蓝色，这表示色温较高，如
8000K的偏蓝光源。
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 in books of 50 stickers. Each sticker measures
2.0 x 0.75 inches (51 x 19 mm).
