User Manual

SpyderCHECKR Gray Target
The inverse face of each CHECKR (SpyderCHECKR on the left,
SpyderCHECKR 24 on the right, above) target sheet holds the neutral target
patches. These patches consist of the same gray ramp in 10% steps or, in the
case of the SpyderCHECKR 24, 20% as the color face of the target. All
colored patches have been removed, to allow for improved neutral perception
by the viewer. An enlarged 50% gray patch has been added for uses requiring
a larger gray sample.
Visual Gray Comparisons
The SpyderCHECKR Gray Target can be used for various types of visual
comparisons. Please keep in mind that visual comparisons of neutrals is a
very subtle process, and that it cannot work effectively if bright colors are in
the field of view. That's why we provide the Gray Targets on a separate face,
as viewing the neutral patches on the Color Target sides will not offer precise
results. Be sure to eliminate colored elements from all other visual fields.
Checking your Display’s Neutrality
It’s possible to use the SpyderCHECKR Gray Target to validate the neutrality
of your monitors. Place the CHECKR, with the Gray Target visible, against a
neutral background under a medium color temperature, high CRI proofing
light, or in a proofing box, that is visible at the same time as your monitor.
Dimming ambient lighting, avoidance of backlight, and avoidance of colored
objects in your field of view are all important to this process.
As your eye adapts to the gray balance of the SpyderCHECKR, shift your
gaze to a totally neutral image on a totally neutral background on your display
(the Black and White images in the Datacolor SpyderProof Matrix image are
intended for this type of use). Shift your gaze back and forth carefully between
the CHECKR and the screen, and see if the screen appears to have a
different color tone from the neutrals in the CHECKR. If so, you may wish to
change your calibration target for your display, to provide neutrals that will
match those under your proofing light.