HP Latex 365 color consistency

[PaulG2020]

Having the same issue and I had started a new thread about this (didn't know this existed). Even with all the suggestions I too still have this issue. I have notices when I turn color correction off I get a print the way I expected.
I have no answer for this other than I turn color correction off. My new question, is printing with color correction off ok to do? If it is not why is there an option on or off?
The images I have uploaded Show color correction on I get Pink/ Purplish grays. Second picture shows nice gradient and also the drop shadow becomes visible, with correction off.
This is a small sample on banner material, this will also happen on every vinyl we use.
This color is NOT visible on pc screen it is only when printing at the printer.

 

[JamesLam]

I think you might be correct here. I'll run some tests to see the results. Thanks

Any follow-up on this? How did you make out with your test results? I'm having the same issues (all of a sudden). I have tried with colour correction (too pink) and w/o colour correction (flat and dull losing much of the colour that should be visible).

 

[darrellcarpenay]

Any follow-up on this? How did you make out with your test results? I'm having the same issues (all of a sudden). I have tried with colour correction (too pink) and w/o colour correction (flat and dull losing much of the colour that should be visible).

I've had no luck fixing this problem. Even my supplier can't figure it out. Luckily I have another printer (Roland) that I can work with if I have this issue with certain prints.

 

[JamesLam]

I meant to post a follow-up a while ago, my apologies for the delay.

Initially I replaced a few (expired) inks and I either replaced or cleaned & refreshed the print heads. Then I went through a number of the test sequences and re-calibrated my HP 365 for the media I use on a regular basis.

Since I was knee deep anyway I then re-calibrated my monitor just to eliminate any potential display issues.

Many of you had provided some good information both through this thread or directly that turned out to be very helpful. And I may have learned a thing or two when using colour correction, etc. (check back in 6 months to see if any of this sticks).

Now the images are as they should be in the sense of both print quality and colour accuracy. Thanks for the help.

 

[darrellcarpenay]

I think you might be correct here. I'll run some tests to see the results. Thanks

I have an update on this. Was having an issue with the pink / magenta hue in the greyscale prints. I changed the media profile to the Generic and switched off the color correction to eliminate the issue. Image attached shows the print with pink hue (with color correction), and the correct image with no pink hue (without color correction) on the HP365 latex printer.

 

[bigsheet]

I've had the same issue on the HP365, warm grey tones. What fixed it for me was going through the full calibration process and creating my own icc profile.

Whenever I ran through the same calibration process, but used the existing icc profile I ended up with the same warm grey.

Now if anyone could tell me why I'm suddenly getting a "color cannot be calibrated on this substrate. White substrate measurement is out of range." on a paper I previously calibrated!! I thought maybe it was a spectrophotometer issue, but I can calibrate on other media just fine??

 

[cornholio]

There is a preripped test print in the 300/500 HP's to test the machine. If this print comes out neutral, your ICC(Rip) is the problem.

 

[GamecockGrafx]

I think you might be correct here. I'll run some tests to see the results. Thanks

I had the exact same issue with my 365 Latex last summer - the grays were printing pink - on all substrates where I could choose one of the lesser "print passes" choices. In other words, on vinyl media preset, I could go with the standard 10 pass choice or what seemed to me, a more economical 6 pass choice. When I did the 6 pass, it was pink. After several trials and tribulations, I used the default 10 pass choice and voila! Perfection. Cost savings on 6pass vs 10pass not even worth it. Good luck!

 

[mattc5900]

I have ran into the same problem with my 365.. if i have color correction turned off. I get good grayscale but if turned on i get pinkish grays. I have tried new profiles ect and cant seem to find a solution except for tuning color correction off.

 

[darrellcarpenay]

This issue continues to haunt me with this printer. So I encountered it again today and couldn't figure out why, because I've been using a profile that has relatively accurate colors even with grayscale images. I created the profile by cloning generic self adhesive vinyl and putting in my own temperature without changing anything else.
It failed today and I created a new one just to check, and it worked once again. I think that the color calibration for the self adhesive vinyl is just about the most accurate when it comes to the grayscale images, so clone it and the only think you should adjust is the temperature. I wouldn't do any calibrations on it.
Since this is a constant issue thought, I want to run some more tests with some other profiles and see what happens.

Small tip, there's a preview option in one of the tabs in production manager that allows you to see the image and how it will look printed. It doesn't work on the fly, but if you change the color profile in the color correction tab, and check the preview, you'll see a preview when you check the box.

I saw somewhere, also, that someone said that recalibrating and creating a new icc profile worked - want to give that a try also.

 

[JamesLam]

This issue continues to haunt me with this printer. So I encountered it again today and couldn't figure out why, because I've been using a profile that has relatively accurate colors even with grayscale images. I created the profile by cloning generic self adhesive vinyl and putting in my own temperature without changing anything else.
It failed today and I created a new one just to check, and it worked once again. I think that the color calibration for the self adhesive vinyl is just about the most accurate when it comes to the grayscale images, so clone it and the only think you should adjust is the temperature. I wouldn't do any calibrations on it.
Since this is a constant issue thought, I want to run some more tests with some other profiles and see what happens.

Small tip, there's a preview option in one of the tabs in production manager that allows you to see the image and how it will look printed. It doesn't work on the fly, but if you change the color profile in the color correction tab, and check the preview, you'll see a preview when you check the box.

I saw somewhere, also, that someone said that recalibrating and creating a new icc profile worked - want to give that a try also.

I've never found the 'preview' options in PM to be of any use. Am I missing something?

 

[MikePro]

pics of your nozzle test to confirm software vs hardware issue but greys printing with blue'ish/reddish hues is typically a color profile issue.

 

[Jay137]

Wow it's been 6 years, nearly forgotten this thread I made exist lol here's my input, originally when we had this issue, the fix was very silly one button fix, we accidentally turned on the colour management in the rip, and sure does, the magenta was bumped to 100%. Turned off, voila, instant fix! Lol

We still occasionally get an issue with grey tones though and usually switching profiles fix this for us.

Great suggestions by the way! Next time I encounter an issue I'll definitely try one of these, especially turning off the colour correction in the printer.

Thanks all! Happy Printing!