the 1 and 3 number keys, is an excellent way to check that the pattern of measured
patches matches the pattern of pure patches.
Patch Value Display: In the lower left hand corner of the screen values for the
currently selected patch are shown. The arrow keys can be used to navigate to any
patch. In Pure mode, the display shows the RGB values sent to the printer. In Split or
Measured modes, the display shows the measured L* a* b* value for the selected
patch, if that patch has been measured.
Using the Spectro: Now begin reading the patches on your printed target, beginning
in the upper left hand corner, and moving across each row, as the colored highlight
indicates. Place the nose of the Spectro flush on each patch, and push the top plate of
the Spectro (or the Enter or Return key) to initiate reading. There will be a click sound
when the measurement starts, and a different click sound when the measurement is
complete. The reading process takes less than a second per patch. Move the Spectro
to the next patch and repeat. With practice, reading rates of a patch per second are
possible on faster computers.
Backing Note: For thin papers it is recommended to read the patches on a white
surface, or ideally to have one or more further sheets of the same paper below the
sheet being read, to assure accurate readings. Reading thin media on backings of
other colors can effect reading results. For printing on canvas that will be stretched
and framed, a black backing for patch reading may be more representative of the final
image conditions.
Spectro Positioning Note: Using a proper height table and chair eases the patch
reading process. If you find your hand slipping forward on the Spectro your chair may
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