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Printing in pixels? [message #66368] Thu, 18 April 2013 18:03 UTC Go to next message
avatar GarySG  is currently offline GarySG
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So, I was watching a video of an objet printer earlier, and it displayed them using white and black plastics materials, as well as a support material in a single print. That alone, is pretty damn amazing. Not only that, but they were able to combine the white and black on some of the sections of the part to produce a seemless gray color. So white, black, and every shade of gray in between is possible to be printed in one part, in theory. This got me thinking..

If they were able to add one extra material option, and you made the colors RED, BLUE, and GREEN.. could you not use them in the same way a computer monitor uses pixels? To produce full color prints out of plastic by combining the different colors together in the model, and the color wouldn't just be surface deep, so it wouldn't have the draw backs that full color SS has.

It would be understandably more difficult to design a part for this though, you'd need to have different bodies inside the file that were assigned the individual colors, most likely. So the STL format, and other common ones alike would be inept. Or, you could just use the files that store the texture as well, and the shapeways computers could sort out where the different color plastics would go based off of the texture map.

Anywho, I know this is lengthy, but the applications for objet printers seem unlimited!


"Hm, I'm so hungry I could eat an entire cow. Gerard, fire up the printer!"
Re: Printing in pixels? [message #66369 is a reply to message #66368 ] Thu, 18 April 2013 18:11 UTC Go to previous messageGo to next message
avatar Youknowwho4eva  is currently offline Youknowwho4eva
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Yea, that tech has been around for a little while. How to do the file is the issue.


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Re: Printing in pixels? [message #66385 is a reply to message #66368 ] Thu, 18 April 2013 22:01 UTC Go to previous messageGo to next message
avatar UniverseBecoming  is currently offline UniverseBecoming
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Good point Gair.

Both printers are using inkjet so I don't see why Objet hasn't implemented this in color. It must be something related to patent issues I would think.




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Re: Printing in pixels? [message #66422 is a reply to message #66385 ] Fri, 19 April 2013 13:01 UTC Go to previous messageGo to next message
avatar Wahtah  is currently offline Wahtah
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You would need 5 colors to 3D print full color: Cyan, Magenta, Yellow, White and Black.

It's like a color inkjet paper printer, except that doesn't need white because the paper is already white. Paper printers also don't really need black, because the colors are transparent and can be layered on top of each other. Doing this would cause blurry, murky text so black is added as a separate color. If you want to 3D print color through and through you'll need non-transparent colors, so you'll have to have separate black.



Re: Printing in pixels? [message #66445 is a reply to message #66368 ] Fri, 19 April 2013 16:10 UTC Go to previous messageGo to next message
avatar lensman  is currently offline lensman
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GairBear66 wrote on Thu, 18 April 2013 18:03

If they were able to add one extra material option, and you made the colors RED, BLUE, and GREEN..


I think what you meant was red, blue and yellow, since those are the primary colours from which all others are derived. So, yes, in the future we could be using those - with black and white, or the standard could be CMYK as wahtah alluded to.

Whichever, I hope it comes soon.


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Re: Printing in pixels? [message #66447 is a reply to message #66445 ] Fri, 19 April 2013 16:31 UTC Go to previous messageGo to next message
avatar GarySG  is currently offline GarySG
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lensman wrote on Fri, 19 April 2013 16:10

GairBear66 wrote on Thu, 18 April 2013 18:03

If they were able to add one extra material option, and you made the colors RED, BLUE, and GREEN..


I think what you meant was red, blue and yellow, since those are the primary colours from which all others are derived. So, yes, in the future we could be using those - with black and white, or the standard could be CMYK as wahtah alluded to.

Whichever, I hope it comes soon.




I used red, blue, and green as an example because those are the colors used in computer monitors. But someone above had a good point, that black and white would also need to be included. Although I'm not sure if there is a difference in application between using red, blue, and green/yellow VS using magenta, cyan, and yellow.


"Hm, I'm so hungry I could eat an entire cow. Gerard, fire up the printer!"
Re: Printing in pixels? [message #66449 is a reply to message #66447 ] Fri, 19 April 2013 16:56 UTC Go to previous message
avatar mygadgetlife  is currently offline mygadgetlife
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GairBear66 wrote on Fri, 19 April 2013 16:31

lensman wrote on Fri, 19 April 2013 16:10

GairBear66 wrote on Thu, 18 April 2013 18:03

If they were able to add one extra material option, and you made the colors RED, BLUE, and GREEN..


I think what you meant was red, blue and yellow, since those are the primary colours from which all others are derived. So, yes, in the future we could be using those - with black and white, or the standard could be CMYK as wahtah alluded to.

Whichever, I hope it comes soon.




I used red, blue, and green as an example because those are the colors used in computer monitors. But someone above had a good point, that black and white would also need to be included. Although I'm not sure if there is a difference in application between using red, blue, and green/yellow VS using magenta, cyan, and yellow.


Red, blue and green as used by computer displays - well, any colour display - are using an additive process. For example, you get yellow light by mixing green and blue light.

Printed materials use the CMYK process, a subtractive process where nominally white light is filtered by the inks before it reaches your eyeball. For example, to get red, mix cyan and magenta (maybe yellow?) to filter out everything but red.

As mentioned above, this is how FCSS is printed. In theory, with a small enough nozzle, you could have a printer that delivers CMYK coloured material mixed in such a way as to appear full colour - but the 'dots' of material would have to be really tiny (the size of a retina display pixel) to make the model appear anything but grainy.

I have no doubt that it will happen (the same way people talked about colour laser printers when the first laser printers hit the market).


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