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  1. #1
    Join Date
    Jan 2012
    Location
    China, Korea
    Posts
    31

    How to print deep blue

    Hello Printers,
    I am not a printer nor in printing industry, but I am an inexperienced graphic designer. I need an advise on how to print a very deep blue color on offset printing. I am doing a catalog for an artist who uses this deep cobalt blue color. His technique of applying the color is very special, so when seen with human eye it is very illuminating. RGB display can imitate the optical effect of his blue colors decently, but numerous trials on different publications show that offset printing can't get anywhere close to the original color by the artist. Sometimes it gets muddy grayish blue, but sometimes it gets more to the purple side with a lot of magenta in it.
    If you want to get an idea of what kind of art I am talking about, you may visit
    www.chimeddorj.com (Note: most of the photos on the web site may be below standard)

    The reason is that process cyan, magenta and a bit of black can't really create a pure Cobalt Blue (besides the light transmitting effect of the medium). So I was thinking if there was a way to add fifth printing plate with a pure blue color from Pantone Solid Colors. That way the Spot Pantone blue that is closest to the artist's color will act as a base and CMYK color will add necessary shades depending on the situation.
    Does it sound reasonable? Does any one think it will work? I need your opinions or expertise. Thanks a lot.

  2. #2
    Join Date
    Feb 2009
    Location
    south wales uk
    Posts
    378

    there is no reason that you cant add it as an extra pantone colour, obviously the printing price would go up from a 4 colour to 5 colour. if however it is a big solid i prefer to lay a halftone behind it 1st, then put the solid down. i know its extra work but depends on the size of the solid and the size of machine (rolling power) its being printed on, which could take it up to 6 colour.. in corel if the solid is put in and when colour seps is on the print preview should automatically give this the 5th plate.

  3. #3
    Join Date
    Oct 2008
    Location
    retired to panama
    Posts
    408

    You mention that you intend to print the job offset but you make no mention of what sort of stock you intend to print it on. My recommendation would be to try printing the images on a gloss stock with good holdout and then soften everything up with a coat of satin aqueous coating. The high holdout of the gloss coated stock will allow you to come closer using the cmyk palette. It may take you a couple of rounds of color correction and proofing but i didnt see a single image on your link that couldnt be matched reasonably close with cmyk. If all else fails you could go with 5th color touch plate as you described but it will be hard to accurately proof. You may wind up having to mess with various colors on press to achieve what you're looking for if you wind up going the 5th color route. Good luck and let us know how you make out.

  4. #4
    Join Date
    Dec 2009
    Location
    Kennesaw, GA
    Posts
    473

    I have to agree with Tom, after looking at the blues from the website used in some of the artists renderings I see no reason these could not be reproduced with typical CMYK. A good prepess department would be needed to make separations as these are more than likely not in a digital format. This would be the key first step. Once on press, if it has Image Control or Inpress (Heidelberg) matching the color and keeping it consistant should be a walk in the park.

    Looking at the website I could not tell if there is any gloss due to the paintings being done with oils or water, if there is depending on the gloss level desired you could go either aqueous or UV.

    All in all, the works should be able to be reproduced on an offset printing press.
    Heidelberg Apprentice Development Program.
    Turn your passion into a career...

  5. #5
    Join Date
    Jan 2012
    Location
    Sydney, AU
    Posts
    10

    All modern printers need there to be black and colour cartridges, containing ink, to print.

  6. #6
    Join Date
    Jan 2012
    Location
    China, Korea
    Posts
    31

    Thanks for all who replyed to my question. At the same time I am sorry for showing you not very good examples on the web site. I have to tell that those images on the web site have been taken "not professionally" and probably couldn't represent the true effects of the artist's canvas colors. Some of those website images have been used from CMYK files. One has to see the real works to see the difference of the colors. When I take the digital photos and load it to my computer, I can see how different it looks from the original paintings. I guess the human eye perceives the colors a little differently than the digital camera renderings. Most of the time, the blue becomes lighter in tone in digital camera.

    Here is an example of picture that is a little better than the web site examples. What I am trying to say is that. It is difficult to capture the color effect 100% in digital camera. Then, the effect further degrades when printed. I have seen examples of the artist's works printed in Korea, Japan, Germany, China etc. Although, some of them comparably better than others, the optical effect of the blue medium is still not there. That is why I am wondering if adding the fifth solid color could make the printed copies better.
    [IMG]C:\Users\BAT\Desktop\Example.png[/IMG]

  7. #7
    Join Date
    Jan 2012
    Location
    China, Korea
    Posts
    31

    Example Image

    Sorry for the previous mistake. I am attaching an image file. I hope it works. Please see the attachment.
    Attached Thumbnails Attached Thumbnails How to print deep blue-example.png  

  8. #8
    Join Date
    Feb 2009
    Location
    south wales uk
    Posts
    378

    i cant see why there would be a problem printing this personally, i did however once print some christmas cards for an 'Artist' in pantone 032 red, when she came to collect the red wasnt quite red enough.... lol i threw the whole job on the incinerator and told her to go elsewhere... kept the workshop warm i suppose... she did see a pantone swatch before i went to print and agreed it... some people eh????

  9. #9
    Join Date
    May 2010
    Location
    sydney
    Posts
    11

    Print it on a pearlescent face stock, lay down a blue PMS spot colour, reverse out other areas and lay down an opaque solid white base with your process colours over the solid white to achieve the luminescent result you are seeking in the blue areas only

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  11. #10
    Join Date
    Feb 2012
    Location
    Philippines
    Posts
    19

    Have you tried this? C=100, M=80, Y=0, K=40

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