Hi Everybody,
It has appeared to me for a very long time that the CMYK colors chosen from the CMYK color docker do not display correctly in either DRAW or Photopaint.I have no idea why this is happening.
Here are five hues (tints, whatever) for equal value for magenta and yellow. Those values have nothing to do with the eyedropper tool. They are the entries in the CMYK color docker. The hue starts out as red. Then almost immediately shifts to orange. Then to orange-yellow. That does not happen if you vary the transparency of the (0, 100, 100, 0) layer. In that case, the hue remains constant as the lightness varies.
I have simply ducked this problem by using RGB. The hue remains constant in RGB as the values are changed proportionatately
Just out of curiosity, has anyone else noticed this behavior. Could it possibly be "normal".
Here's CMYK:Here's RGB:Phil
The capture posted here shows the swatches from another post with the C0 M100 Y100 K0 again at 50 % transparency, at C0 M50 Y50 K0 and the transparency converted to a CMYK image.
The captures shows the image displaying the same as the C0 M50 Y50 K0 as it should the eyedropper reads the transparency the vector and the image the same.
Herein lies the rub, those who design by eye cannot rely on the eyedropper tool it's incorrect per the display, if they want the C0 M50 Y50 K0 look and they adjust the transparency to the eyedropper and then import or build other vectors to match they have problems.
Again, there is another rub, all RIPs are not created equal! The conversion of transparency is not controlled by the Adobe specification in their license. Prinergy, Apoge and Meta do a good job, later versions are all PDF RIPs supporting live transparency other PDF RIPs are not as robust. Postscript RIPs have much more serious variations.
I was called on a job for a sign company doing vehicle graphics a while back the client an energy company had a logo with multiple monotone shades and gradients and unpredictable variations of the logo was printing. The files were AI MAC created by their client, as it turns out the two designers they had working did the logo differently one used true vector shading and gradients the other used transparency. The logo with transparency was printing differently then the true vector version and differently on different devices. USE OF TRANSPARENCY NEEDS TO BE TESTED ON THE DEVICE before output behaviors can be predicted.
Phil1923 said:I keep it "calibrated" as follows. 1. I compare prints from COSTCO to the monitor during the day and during the evening. 2. I exchange comments on posted photos with people from other photo forums.
That's not calibration that's a mess. Buy a Spyder5 Pro $150 and a real buy supports Windows 10.
Phil1923 said:They have recently switched to ink jet printers. Do I have to change how I retouch photos to accommodate ink jet printers.
Yes! I would not expect that the support from your provider will not be very good. While almost all ink jet devices honor embedded profiles for images many use an assumed color spaces work flow for PDF files. This is done to support PDF files from applications like InDesign and CorelDraw that utilize multiple color spaces in their output streams.
First your Samsung display is not very good, you may not be able to actually get it calibrated, if you can calibrate it or if you replace it with one that can be calibrated, light your work environment well. Since you work sRGB look for 6500 kelvin lighting, simply edit to the display, you'll get on images an output very much like your display since most likely the newer ink jets can exceed sRGB gamut.
Spot colors will be dubious, as will some if not most CMYK this is because most of these device are made outside the U.S. and do not always use North American Standard profiles, Canon many times uses ECI, 3M many times uses Japanese profiles, Fiery Rips tend to be set up more regionally , do not expect the operator to know.
Hi Milisock,
Get lost.
Stalking is a crime.
Phil