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Printed colors problem [message #71802] Thu, 18 July 2013 15:51 UTC Go to next message
avatar Alteromaro  is currently offline Alteromaro
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Registered: April 2013
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Junior Member
Hello everyone!
Please help. We have a big problem with printed colors on our models. Colors on a printed figurine are not the same comparatively to original colors on a model. Also some problem with red colors or similar to red colors. Here is an example (left - original model, right - printed figurine):

index.php?t=getfile&id=36761&private=0

How can we solve this problem, how to make colors more accurate to the original model and how to avoid that red coloring if i make a texture with similar to red colors? We wan't to lost our money and a time with this problem, so please help.

A big thanks for any suggestions.

Re: Printed colors problem [message #71835 is a reply to message #71802 ] Thu, 18 July 2013 23:00 UTC Go to previous messageGo to next message
avatar stonysmith  is currently offline stonysmith
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Here's something to help you understand the variation: Take your rendered images and print them onto paper. Compare the resultant print to that of what you find on the FCS models. There is a BIG difference between how a computer display shows an image versus what printers (3d or paper) can produce.

The FCS printer uses CMYK ink. It will "never" be exactly what you see on a computer screen.

Admittedly, the FCS printer has a reduced depth compared to what a common inkjet printer can produce, but you need to understand the RGB -> CMYK conversion process. I would suggest a google search on CMYK vs RGB.. such as http://en.wikipedia.org/wiki/CMYK_color_model#Comparison_wit h_RGB_displays

There is a whole sub-topic of "color profiles", and it's possible that the FCS printer needs some tweaking, but that's a discussion for another day.


Patience, Persistance, Politeness - the 3Ps will help us get us to Perfect Printed Products
Re: Printed colors problem [message #71868 is a reply to message #71802 ] Fri, 19 July 2013 14:14 UTC Go to previous messageGo to next message
avatar Youknowwho4eva  is currently offline Youknowwho4eva
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In my opinion they look pretty good. I received a model this week that was supposed to be yellow but came out more green. It's not a huge deal in my case so I let it slide. Now the prints do come out a little dull. Check through the post production section for some good techniques to make your colors really pop.

[Updated on: Fri, 19 July 2013 14:14 UTC]


I learned a long time ago the wisest thing I can do is be on my own side, be an advocate for myself and others like me. -Maya Angelou
michael@shapeways.com Community Advocate
Re: Printed colors problem [message #71874 is a reply to message #71868 ] Fri, 19 July 2013 14:53 UTC Go to previous messageGo to next message
avatar AmLachDesigns  is currently offline AmLachDesigns
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Several users have done some work on this that may be helpful. The latest one I could remember is this one by entertailion: 70999

Hope it helps, good luck.

[Updated on: Fri, 19 July 2013 14:54 UTC]

Re: Printed colors problem [message #71888 is a reply to message #71874 ] Sat, 20 July 2013 01:11 UTC Go to previous messageGo to next message
avatar stannum  is currently offline stannum
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The system used gives a quality similar to 90s inkjet printer with non photographic paper. And there is no calibration. So don't expect magic.

Blatant plug: tridimensional grid of color samples, resolution patterns and basic gradients for full color sandstone to get a wide range vision of how things translate.
Re: Printed colors problem [message #71894 is a reply to message #71888 ] Sat, 20 July 2013 06:30 UTC Go to previous messageGo to next message
avatar AmLachDesigns  is currently offline AmLachDesigns
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Sorry, that's the other one I was thinking of...but that was months ago, so my brain couldn't get there.
Re: Printed colors problem [message #77731 is a reply to message #71802 ] Tue, 29 October 2013 00:47 UTC Go to previous messageGo to next message
avatar mdahmke  is currently offline mdahmke
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Registered: January 2013
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Hi - I'm trying to get my UV Map colors to come out right on color sandstone. I'm getting ready to print another test model with Blender settings:
Texture: Influence: Blend = Add, Colors: Brightness, contrast, saturation = 1.
Material: Diffuse, color black.
I also increased the brightness of the image used for the UV Map.

On my first print test, the white cat came out as a medium gray. See attached.
What is also frustrating is that the Shapeways preview colors are not even close to accurate for color sandstone.

Any suggestions would be appreciated.

I'm going to order the new model which will boost the brightness... also I'm going to order the color quick ref:
https://www.shapeways.com/model/134424/color-quick-reference .html

Thanks

index.php?t=getfile&id=43926&private=0

  • Attachment: blender.jpg
    (Size: 96.51KB, Downloaded 137 time(s))

Re: Printed colors problem [message #77741 is a reply to message #77731 ] Tue, 29 October 2013 07:49 UTC Go to previous messageGo to next message
avatar mkroeker  is currently offline mkroeker
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Part of your problem could be the light scattering on the rough surface making the colors appear dull. Try coating (part of) your gray kitty with an epoxy (I have seen the "glaze coat" brand recommended in older threads). Also see the other current thread with "kitty content" over in the "It arrived!" forum.
Re: Printed colors problem [message #77767 is a reply to message #77741 ] Tue, 29 October 2013 12:52 UTC Go to previous messageGo to next message
avatar Youknowwho4eva  is currently offline Youknowwho4eva
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mkroeker wrote on Tue, 29 October 2013 07:49

Part of your problem could be the light scattering on the rough surface making the colors appear dull. Try coating (part of) your gray kitty with an epoxy (I have seen the "glaze coat" brand recommended in older threads). Also see the other current thread with "kitty content" over in the "It arrived!" forum.


I am more than happy with the way using glaze coat on one of my prints turned out Smile. It would probably take some experimenting to get the consistency right for applying to a statue like yours.


I learned a long time ago the wisest thing I can do is be on my own side, be an advocate for myself and others like me. -Maya Angelou
michael@shapeways.com Community Advocate
Re: Printed colors problem [message #77795 is a reply to message #71802 ] Tue, 29 October 2013 19:43 UTC Go to previous messageGo to next message
avatar MrNib  is currently offline MrNib
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I strongly recommend making little test pieces that can be individually colored, sprayed, coated, mashed, scratched, sanded, brushed, dropped, heated, frozen, moistened, etc. to learn about material behaviors and post-processing.

Re: Printed colors problem [message #77872 is a reply to message #77795 ] Wed, 30 October 2013 16:16 UTC Go to previous message
avatar mdahmke  is currently offline mdahmke
Messages: 3
Registered: January 2013
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Thanks for all the suggestions - I will try the glaze coat and also will run some more test prints.

 
   
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