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And how do they get printed on a monochrome printer like a laser?


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To add onto this, what about monochrome laser printers? Where is the yellow coming from in those cases?

Even monochrome printers?

Lasers, just like normal film prints.

laser print

Are there any known forensic marking methods used by monochrome laser printers?

Fair enough. I'd looked at your profile and assumed you'd have come across plenty of laser printers at large orgs like LEGO & Universal Music. I guess the swathe of energetic replies to your first question have now convinced you, in any case.

It's a bit of a trope, people calling monochrome printers black & white -- they don't print the white areas, of course. Some light-yellow paper would have been appropriate for the fanfic. : )


Hey, laser printers do it

Yes, they're usually LED, not Laser, but it doesn't make much of a difference. They print color just fine.

Almost everything I print is color, usually things like signs, decorations, letters with photos, etc.

If I printed documents regularly I suppose I'd probably want a laser, but it's not a very common thing for me, maybe twice a year, generally 1 or 2 pages at most.


Apropos. I just invented 3D-way to implement color laser printer. Firstly you have enclosed chamber with transparent top. Then you blow some color powder in the chamber. Maybe you apply some electrostatic forces to speed up the process. When the dust has finally settled on the paper, you just zap it with laser. The melted powder adheres to the paper at appropriate points. You suck the loose powder back to its container and repeat the process with next color.

This is clearly more economical construction compared to Xerox-style laser printer. It collects the powder firstly on separate surface, heats that and then presses adhered shit to the paper.


Color printers are known to.

true. black and white laser printer is the only way to print.

The article clearly states that the yellow dots are printed by _colour_ laser printers.

That's laser printers

Or just CMYK like printers...

I print color documents all of the time on my home (Dell C1710nw) laser printer. The necessity of color is heavily dependent upon which type of documents are being printed. Life isn't monochromatic for me.

Now at work there are only rare occasions that I print anything at all, preferring electronic copies of everything. When I do print, most everything is monochrome.


Are laser printers still a ‘thing’? I recall having one as a kid and it just wiped the floor against any InkJet printer I’d used - holy crap.

It was limited to black and white though.


As I understand it, only color laser printers have the resolution to print these yellow dots at such a small size.

I was thinking about a color laser printer - didn't know about this issue - thanks
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