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Template Color Scheme?
Submitted by billyjmc on Sun, 11/29/2009 - 17:11
So, I was looking at the template, and I noticed that one of the vertices of the unfolded tetrahedron is blue, which is not a primary subtractive color, with no cooresponding ink cartridge in the printer. As I understand it, blue is a secondary color composed of cyan and magenta. I was wondering why blue is used for this vertex rather than black, and how we are supposed to print the plates for experiments which do not contain Fe or Cu (the standards) in the experimental mixture.
Shouldn't there be two different templates, one with the standards only and one with the unfolded tetrahedron only, so that we may print the standards, change the ink cartridges, and then print the experimental mixture? Am I not using the correct template?
great question - I need help too
I am also looking for more information on the printing template (SHArK Template Test 4-01 jpeg). How do we determine the concentration of yellow, cyan, magenta, or black (if any) for each rectangle? I printed out the tetrahedron and put it together but I am still confused. Is the 4th corner (darker blue) composed of only cyan and magenta? Or does it have yellow too? If someone can explain how the color gradients were made that would be very helpful. If possible I would like to make a tetrahedron with black as the 4th corner that way we can utilize all 4 components.
Sean
working on it...
I am working on an answer. To my knowledge, the blue was composed so that it was printed using only the cyan cartridge, the yellow with the yellow, and the magenta with the magenta - but I will have to talk to the person that constructed the template to confirm this. The black we know is composed of either black/magneta or black/cyan depending on what setting is used. To print accurately we have been suggesting that you print the colors only using the color setting and then the black using the gray scale setting...which means that you technically will have to print 6-8 times in order to get enough metal nitrates on the substrate. Not ideal, but we are working with HP to try to solve that problem.
We were just trying to get as many gradients as possible. If either of you have better ideas, or know of a print driver hack for this printer so we can control what you are printing exactly, I would love to know. We also haven't worried so much about the template b/c not many people were printing. Can you print with the template we provided? I would say don't worry about the 4 metal combinations right now...we would just like to know if people can print 3 metal combination...
Also if either you would like to work on developing a solution, we would love your help! Also I will upload the two images we are using for splitting the template to print in color and then grayscale.
Printing only the black?
How are we supposed to print only the black? Shall we edit the template and "white out" the areas which we don't want to print?
[edit: nevermind, I just saw that Jenny posted some "split" templates. Sweet!]
Here's some of my preliminary findings regarding inks (I need to test some more to confirm 100%): when printing onto the substrate in CD mode, if you use the "standard CD," the blank ink comes from the pigment black cartridge (the larger one), but if you select the "waterproof CD," the black ink comes from the photo black cartridge. This may be useful so all five cartridges can be employed. I don't know if this is old info, or if y'all have a different workaround, but now it's out there.
I think we should have a wiki area on the website. It's somewhat difficult to find up-to-date info by looking in these forums, and it's difficult to tell whether people are using the new or old printers by their posts. If we had a wiki, all of these tidbits could be compiled into a central location and organized. Just a thought. As I understand it, Drupal has a wiki engine built-in...
Billy
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Billy McCulloch
Ozerov Research Group
Texas A&M University
Great!
I knew that selecting a certain setting would change what cartridge was printed from, but I wasn't exactly sure which one. I have brought up the suggestion of the wiki area to our website administator about this. In terms of how the nozzles fire, there are contacts on the back of the printhead. These contacts (one round circle) not only fire 1 color, but can fire up to 3 (if I remember correctly -it might actually be more) different nozzles at the same time when it is asked to print on a certain setting. This is why we are getting blending of colors and why we were playing with the settings to see if we could get increased purity. I will take a look at the "hack" post and see what I can figure out. Thanks for all of your work and using the website! It is helping me not have to respond to many differnt emails asking the same thing!
Thank you Jenny. Yesterday I
Thank you Jenny. Yesterday I printed using the new template. It seemed to work properly. The printout covered the entire FTO up to 2-3mm of the edge. I printed 5 times drying with a heat gun in between printouts. The tiny rectangles were separated but they were blotchy (not really rectangle in shape) - I don't know if that is normal.
I would love to help with the template but I will need to learn more. I have no idea how the HP combines the cartridges to make each color. That's why I have so many questions.
Sean
blotchy-ness
Sean -
Was the blotchyness seen when you were printing with chemicals? We found that by adding a little bit of HP D5460 ink (which can be found at www.inkproducts.com) to the mixture will stop that and also allow you to see where you are printing. Let me know how things progress!
Jenny