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Role of ferrofluid in
inkjet printing
Traditional
inks used in inkjet printers are non magnetic, i.e. there is no remnant magnetic
signal that can be detected once the ink has been jetted onto a surface. By
incorporating Angstrom sized magnetic particles (typically 10% by weight)
into the formulation, an ink is produced which is capable of retaining a
magnetic signal and can subsequently be read by very simple and inexpensive
magnetic recording technology. This class of magnetic inks has applications
where low resolution characters need to be read quickly and with minimum
error. Applications include bar coding and address dot codes for use in
document sorting.
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