OMR bubble sizeThe Optical Mark Recognition or OMR reader is attuned to read and record black marks on a special sheet that has index points on its corners. The OMR sheet is available in the form of answer sheets, admission forms, etc. Whatever is the type or design of the OMR sheet, every sheet contains bubbles, blocks or boxes. Every question would have four to five bubbles that represent the answer options given. The candidate or student has to fill one bubble for every question. These marks are read by the OMR reader according to which the paper is evaluated. One thing that designers should be aware of is there are certain rules that they have to follow in terms of the OMR bubble size.Size of the bubblesIt is possible to increase and decrease the size of the bubbles. Nevertheless, the optimal size limit of an OMR bubble is around 40-5050-60pixels. This is because only this thickness can provide a contrast from the text bubbles printed inside the bubbles and the thickness of the outlines. The size of the bubbles should be big enough for the candidate to fill them completely, without straining their hands much.The size of the bubble would ultimately depend on the size of the index points as well as the design of the OMR sheet. Some would consider creating bubbles smaller than the optimal size to include as many bubbles as possible in a single sheet. However, the OMR reader may find it difficult to read. While an OMR reader that has a higher sensitivity mode would be able to work on such sheets, this can lead to unnecessary rejections, making the processes of reading and evaluating extremely slow.Although small bubbles are not advisable, too large bubbles should also be avoided on OMR sheets. If there are really huge bubbles on the sheets, the students or candidates would have to spend extra time coloring every bubble, due to which the paper may remain incomplete. Distance between bubblesApart from the size of the bubbles, distance between the bubbles is also an important factor to be considered. The bubbles should not be crammed up together as this can cause you to receive inaccurate results. Appropriate distance should be maintained between the bubbles of the same block as well as the adjacent ones.Size of text inside the bubblesAnother thing to be considered is the size of the text written inside the bubble. The text should be as small as possible. Large or thick font should be avoided as the OMR reader detects dark marks and it may detect the text marks, causing confusion. However, the size of the text labels can be large in case you have used colored bubbles.These tips have to be considered while designing the OMR sheet. The bubbles should of perfect size, as bubbles that are too big or too small can hamper with the function of the OMR reader, giving rise to inaccurate results the possibility of errors.

Post By,Addmen GroupWebsite: http://omrtestsheet.com/