2022.2

Printer limitations
Any document printed with Capture Fields (aka Anoto Patterns) must be sent through a Laser printer.
Bubble jet printers are not supported and will most likely cause reading errors with Anoto Digital Pens.
Thermal printers will not work either due to the low quality printout and the absence of actual blank ink
on the paper.
Black ink close to patterns
Because the Anoto Pen & Paper technology relies on infrared to read pure-black dots on the paper, it is
imperative that no other black ink interfere with this reading. Though it is possible to print Capture doc-
uments on a black & white laser printer as long as there is no other ink on top of, or close to, the pat-
terns, this is not recommended. A color laser printer should be used, and any elements placed close to,
or on top of, the Capture Patterns should be printed in color. Black ink can be simulated using com-
posite colors, but should never be pure black.
Paper quality
The PlanetPress Capture technology, when generating the Anoto Pattern, already accounts for ink dis-
persion on laser printers and on general-use laser paper. Therefore, using paper that is not of the same
quality (for example, one where the dispersion rate is much higher) or the same type (reflective paper)
may not permit the pen's camera to read the pattern properly.
Pattern sizes
The absolute minimum required for an Anoto Digital Pen to read the pattern and know it's position on
the page is 7mm (1/4"). Any pattern smaller than this will not be readable. However, at 7mm width and
height, the pen can only recognize a single dot within that pattern, at the top of the field.
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