In case anyone was thinking this applies only to inkjet printers: no, it ONLY seems to apply to laser printers -- the thing that Brother used to be known for.
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In case anyone was thinking this applies only to inkjet printers: no, it ONLY seems to apply to laser printers -- the thing that Brother used to be known for. Where the article says "ink", they mean "toner". There is no ink in a laser printer.
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In case anyone was thinking this applies only to inkjet printers: no, it ONLY seems to apply to laser printers -- the thing that Brother used to be known for. Where the article says "ink", they mean "toner". There is no ink in a laser printer.
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I believe that only applies to ink jet. You can hardly make secret dots in B&W.
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I believe that only applies to ink jet. You can hardly make secret dots in B&W.
There is something similar for B&W laser printing. Text is never 100% black, but rastered. You can digitally hide a whole lot of information in microraster on a page of printed text.
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I believe that only applies to ink jet. You can hardly make secret dots in B&W.
Wait, I thought that's something that only color laser do with yellow toner...
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There is something similar for B&W laser printing. Text is never 100% black, but rastered. You can digitally hide a whole lot of information in microraster on a page of printed text.
Text is never 100% black, but rastered.
Does “rastered” mean the image is mapped onto a very fine grid and each square is given a 0-100 value for intensity of ink? I looked it up, and it seemed like the squares are given a binary value, but this is nowhere near my wheelhouse and I’m honestly not sure I understood the Wikipedia page, let alone the references
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Text is never 100% black, but rastered.
Does “rastered” mean the image is mapped onto a very fine grid and each square is given a 0-100 value for intensity of ink? I looked it up, and it seemed like the squares are given a binary value, but this is nowhere near my wheelhouse and I’m honestly not sure I understood the Wikipedia page, let alone the references
It is actually quite easy: "Black" print does not mean that 100% of all pixels are actually set. Print pixels are never perfect squares, so even if the printer only prints half of the dots, the print is still dark enough. If not, it could print 70% or 80%, but lets stick to 50% for ease of argument.
So instead of
XXXXXXXX XXXXXXXX XXXXXXXXit would print
X X X X X X X X X X X XFor you, it would still be a "roughly black" spot (keep in mind these 8x3 pixel are 0.032mm wide and 0.012mm high on good laser printer).
Would you notice if the pattern was slightly different, like
X X X X X XX X X X X XMake a bonanza of those small changes nobody can see, and you can hide thosands of bytes of data in those patterns on any printed page.
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