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There are various methods of printing OMR sheets and one has to take certain precautions to get accurate results. OMR sheets are the basic components for OMR printing. So following certain technical guidelines while printing OMR sheets can help you get the best output.
Paper Size: Always check the paper size option before printing. Change paper size setting to ‘A4’ if you are using A4 size paper for printing because most printers use ‘Letter’ size format as its default setting. This ensures accurate printing of index points and other dimensions.
Image Scaling: It is always recommended not to change the OMR sheet design to fit the size of the paper. OMR software can still read these variations. For better printing and scanning it is important to keep the size of OMR sheet as it is.
Bubble Thickness: Always use printers with good cartridges. The outlines of the bubbles can appear faded due to overused cartridges. Making changes to the bubble thickness for darker outlines can make the OMR sheet unreadable. So never make any changes to the thickness of bubbles for clear printing.
Quality: The quality of both papers and printers is very essential to ensure good quality printing. Reused cartridges, dust or black lines on OMR sheets and undefined printer settings can greatly affect the quality of reading and evaluation done by the OMR software. Hence, quality can be optimally maintained if the above precautions are taken care of.
Offset printers may try to change the design of the sheet to fit it into the paper due to its default settings. This can move the index points from its place and lead to incorrect reading of OMR sheets. Hence, it is best to first decide the size of the paper before using offset printers for OMR sheet printing.
You can use colored laser or inkjet printer for printing colored OMR sheets. 2 colored printing is used for printing colored OMR sheets of which black is used for index points. Any color like pink, red or golden yellow can be used for the rest. You can still use 2 colors for index points if and only if both the colors overlap each other precisely (zero to zero registration).
