OMR sheets can be printed in traditional black-and-white or in color. Designing colored OMR sheets requires special considerations to ensure accurate scanning and evaluation.
Index points and timeline must always be printed in black, as these are critical for the OMR scanner to detect the sheet correctly.
Other elements of the OMR sheet, such as question blocks, headings, or borders, can be printed in lighter colors like red, orange, or yellow.
Avoid shades of blue or green, as they may interfere with scanning and reduce recognition accuracy.
Printing OMR bubbles in a lighter secondary color enhances accuracy.
During scanning, the outline of the bubbles printed in the secondary color can be filtered out, leaving only the marks made by the candidate.
This approach improves detection, even for small or light markings, making it ideal for feedback forms or tick-mark responses.
Use black for OMR-sensitive components (bubbles, index points, timelines).
Use lighter secondary colors for other design elements, ensuring the sheet remains visually clear and scanner-friendly.
Colored OMR sheets are particularly recommended for feedback forms, surveys, and tick-mark-based responses, where clarity of marked answers is essential.
Designing OMR sheets with the right color combinations ensures high scanning accuracy and efficient evaluation.
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