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MICR quality and format verification

The MICR quality check verifies registration, clear band, voids, and signal strength. The format check verifies that the correct MICR information is being printed on its specified position on the document. To verify the quality and format requires a periodic sampling of the printed sheets.

Sampling frequency

The frequency of checking MICR print quality is based on how many prints the user is willing to reprint should a problem be detected. Greatest attention should be paid at the beginning of a MICR job. The schedule below can serve as a guide for MICR printing applications. With experience, the user of the Infoprint 4000/4100 will discover the best verification frequency.

Time Action
Start of job MICR quality check and format check
Every 2 hours MICR quality check
Change of forms MICR quality check

Vertical registration

The Infoprint 4000/4100 places characters in the same place from page to page within the specifications of MICR printing. The MICR layout gauge measures registration and character placement. The MICR document is inserted into the gauge, and the right-hand edge is aligned with the right side of the gauge. The printer prints approximately three pages per each revolution of the imaging drum. Therefore three consecutive pages should be examined to verify that the characters are aligned vertically and centered within the boxes.

Vertical registration can be adjusted on the touchscreen.

Horizontal registration

In the US, ensure correct horizontal registration by examining character box 33. This box should contain the transit symbol. Ideal placement is for the right edge of the transit symbol to line up with the right side of character box 33. The right side of the transit symbol can be no more than half of a character box left or right of the right side of the box.

Horizontal registration can be adjusted on the touchscreen.

Clear band area

The clear band area is the bottom 15.875 mm (0.625 in.) of a MICR document. This area can contain only MICR characters. The application program must not contain any instruction to print in this area. Because the Infoprint 4000/4100 printers use magnetic toner, borders and signatures that stray into the clear band area can cause rejects. To avoid such rejects, it is recommended that the clear ban area be 19 mm (0.75 in.).

The printer prints three 8.5" x 11" pages per each revolution of the imaging drum. Therefore, a defect in the drum will appear at every three images. Three consecutive pages should be checked for extraneous toner using a mask or the layout gauge to examine the clear band on each page. Extraneous toner larger than 0.076 x 0.076 mm (0.003 x 0.003 in.) should not be in the clear band area. If extraneous toner can be seen at a normal reading distance, the documents should not be put into circulation.


Voids are the opposite of extraneous toner. Voids or malformed characters cause distortion in the magnetic signals read by a reader/sorter to determine what a character is. Characters must not contain a void larger than 0.203 x 0.203 mm (0.008 x 0.008 in.). Check three consecutive pages for voids. A void is acceptable if it is barely discernible at normal reading distance; however, numerous voids indicate that these documents should not be put into circulation.