ICC profiles - Issues with print colours, and pressing

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23express
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Re: ICC profiles - Issues with print colours, and pressing

Post by 23express »

Hi all,

We are having issues with print quality (main issue)... and pressing (but happy to put this bit down to our method not being 100% on the money just yet).

Could really do with some help and assistance where possible please. Bit of a long post so please bear with us.
:confused:



Designed in Canva (image 1) and saved as PDF. When printing straight from the PDF we are aware there are no ICC profiles being used (at least with Canva anyway). We print on Versa paper from IE, using Sublinova Inks. When printed the colours are very similar to the screen such as the pinks and cream/ grey background (and are happy with what we see generally). However the print for the graphic in the middle in black (image 2) is mottled/ blotchy on the print alone - no pressing as yet. We are aware that there will be differences from Image on screen, to when it is printed, to when it is pressed. But this part is supposed to be jet black or at least black, but when printed you can see it is slightly browny/ blonde and not so black - This is where we feel we should use a design software in order to utilise the ICC profiles we were given - but had not done at this point.

When pressing onto slate (image 3) you see the graphic doesn't look black and is very mottled, and now looks blonde, even the gown.



Having looked into this more, reading through the forum, we are aware that using the ICC profiles is best, but for that we need to use some kind of design software. We didn't have any as such, so just downloaded GIMP, (the ICC profiles were already installed onto the laptop when we initially got them but again doesn't work with Canva). With GIMP we uploaded the same image here in order to print. initially the colours and everything on the screen seemed to be fine and matched what we wanted and that found on Canva.


We next watched a tutorial for installing and using the ICC profiles on GIMP (image 4). When we did this, initially it seemed fine, converting to the chosen ICC profiles however when looking at print preview (image 5) it clearly looks like it has different colours than what it should look like.... to us it looks like it is purple instead of pink, and turquoise green/ blue instead of cream/ light grey.


We have read on here that sometimes the print preview image can be different on screen to the actual print and the instructions were to print first before coming to any conclusions... However when doing this, the same colours presented on the print preview screen (that are different to the image on GIMP) were the same purple and turquoise green/ blue shown on the printed paper.

It's like the ICC profiles have changed all the colours from what we see on screen - even though we used the correct profile (versa). Is this the purpose of using ICC profiles?


Also from reading in the forum, we understand that with slates it is best practice to use a pad (if anyone can send a link to what they are using - that would be appreciated), and this could improve the print which is fine... Now we feel the other issue we have is that with the use of ICC profiles... We have now downloaded the free trial of Adobe Photoshop as been advised GIMP can be a bit hit and miss... however after following tutorials, checking ICC profiles are being used, and triple checking everything including the printer settings and profiles... We are finding that the use of these ICC profiles changes everything we see on screen when we get to the print preview screen (just as with GIMP).

We have wasted 3 slates already, with the centres looking very mottled (learning curve, so understandable and happy to take the hit for the time being - and prob an issue with the method). New order of slates just arrived but don't want to press the different coloured print out incase it prints purple and green instead of pink and cream/grey (please let me know if you still think we should try pressing even with the visible difference in colours).:frown:

We are noticing the colour on the print is different - and of course it will be until it is pressed. However don't know why we are having the issues with the print and colour more than the actual faded effect - the faded look may be corrected by using a pad which we intend to get but still feel the issues lie with printing and the colours. :mad:



We know this is a long post, but thanks for reading.


We understand that monitors play a part in all this; however, we are very satisfied that what we see on screen is accurately printed and have no real issues in this regard.

Please could you help with the mottled blacks, the difference in colours when using ICC profiles on GIMP/ photoshop and the use of ICC profiles in general.



Thanks in advance.

Ps -
Epson ET-2850 printer
Sublinova Inks
We use the Versa paper, and the correct side is being used as the other side has the inkexperts watermark all over it.
Thin silicone rubber sheet at bottom, then blowout paper, then print, slate on top, then more blowout paper. (Again we don't have rubber pad - please add links to any you are using that work).

We always preheat our slates.
180-190 temp for 360 seconds - as directed by supplier - did this in the past and did not work for us when pressing both face up and face down.

We next tried 195 temp for 550 seconds and found this worked initially (last month) but then again the images were not heavy on the black side.
Tried this also face up and face down... We found that pressing with the slate on top of the paper worked better for us. Wastage at this point understandable.


Since then, have tried to print and press the above design. Have tried the following so far.
Preheated slates.
Pressing with slate on top of the paper.
195 temp for 550 sec - image in middle mottled and does not look black (image 3 again)

Next went for longer - checking in between... 195 temp for 600 sec, had a peak after this time, checked to see if same issues were present (which they were), so cooked for another 60 sec, checked again still the same, and then cooked for another 60 sec (720 secs in total) (see image 6)

Then finally thought we'd do less time whilst checking... 195 temp for 400 sec initially, checked to see if same issues were present (which they were), cooked for another 60 secs, checking again, and then cooked for another 60 secs without any luck (520 secs in total) (see image 7) :eek:

Ink Experts have provided details on the method they use to press (and will try follow this), but not until the colour situation is sorted, and don't want issues for future projects.
Attachments
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Image 6 - 2nd attempt.jpg (92.63 KiB) Viewed 13 times
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Image 7 - 3rd attempt.jpg (83.32 KiB) Viewed 13 times
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Image 1 -canva design.jpg (11.88 KiB) Viewed 13 times
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Image 2 -mottled print.jpg (93.58 KiB) Viewed 13 times
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Image 3 -pressed slate.jpg (93.35 KiB) Viewed 13 times
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Image 4 -ICC profile.jpg (17.23 KiB) Viewed 13 times
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Image 5 -print preview.jpg (12.29 KiB) Viewed 13 times
pw66
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Re: ICC profiles - Issues with print colours, and pressing

Post by pw66 »

Is your image designed as RGB or CMYK?
Have you stored your paper in dry conditions?
What computer are you using?
Not familiar with Gimp, but when you send to print are you selecting the option that Gimp handles the colours?
Likewise in the Epson print dialogue are you checking the box that says 'no colour correction'? (under 'printing preferences' select the 'more options' tab - then under colour correction check 'custom' and click the 'advanced' button. Check the 'no colour correction' option.)
23express
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Joined: 18 Sep 2023, 12:51
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Re: ICC profiles - Issues with print colours, and pressing

Post by 23express »

Hi Pat,

Thanks for the quick response.

In photoshop it says this is 'Untagged RGB (8bpc)

Using a lenovo laptop 15Iah7. Yes paper is stored in dry conditions.

That screenshot showed that we changed from GIMPs normal settings to the chosen ICC profile, and that the current profile was the ICC for versa. And also that GIMP handles the colours, and not the printer.

When using photoshop, within print set up - we also selected 'Color Handling - Photoshop Manages Color' option.

Yes, in the Epson dialogue, having followed the links, and videos on this, can confirm that we selected custom, then 'No color adjustment'.

Hope this helps.
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Paul
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Re: ICC profiles - Issues with print colours, and pressing

Post by Paul »

I'm not entirely sure where your ICC profile is coming from, but it's best to have one custom-made. From what you've described, it sounds like there might be an issue with either the ICC or the settings in Photoshop. Regarding the mottled effect on slate, it's unlikely to be caused by the ICC. It seems more likely that there wasn't enough heat or time applied during the press. Using a heat pad can make the job of printing on slates much easier. I've found a link to a similar product that should work as long as it's smooth and without any texture or print on it. Just remember to add extra time when using a silicone pad.
https://www.amazon.co.uk/Foepoge-Multip ... =8-18&th=1
http://www.howtoprintstuff.co.uk <-- How To Print Stuff BLOG
23express
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Joined: 18 Sep 2023, 12:51
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Re: ICC profiles - Issues with print colours, and pressing

Post by 23express »

Hi Paul,

Thanks for sending the link through. Just had a look and in fact we have this silicone pad (thought we may have needed a thicker pad to help with contact/ coverage etc).... Ours is smooth and in grey, and that is what we use this at the bottom as mentioned above *Thin silicone rubber sheet at bottom, then blowout paper, then print, slate on top, then more blowout paper. (Again we don't have rubber pad - please add links to any you are using that work).* <=== We have also tried the silicone on top, and found when placed at the bottom, we had better results. Also to note - we always preheat the slate, the silicone mat, and the blowout paper before hand. We keep the subli paper in a dry room, and also give the print some time to rest (5-10mins) to let ink dry before pressing.

ICC profile was from InkExperts. Everything we have is from them.

Regarding the times, we did increase these from initially trying 360 secs... Eventually topping 9 mins at 195 temp, but seemed to get worse results.

We know it is very much trial and error - and believe we will overcome the pressing issue - just worried about the print/ print preview colour when using the profiles.

Thanks again
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Paul
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Re: ICC profiles - Issues with print colours, and pressing

Post by Paul »

This is an ancient video I made 11y ago but still valid in most cases. As you can see silicone rubber is on top. No point in having it at the bottom as you have a rubber pad on your press.
https://youtu.be/bRPjOBeLpU0?si=d2b56lVKmR8ufi79
http://www.howtoprintstuff.co.uk <-- How To Print Stuff BLOG
23express
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Joined: 18 Sep 2023, 12:51
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Re: ICC profiles - Issues with print colours, and pressing

Post by 23express »

Thanks Paul, we actually watched your video earlier today, and was very thorough and insightful - we are am happy to follow this method with silicone at the top.

We still feel there are issues with the ICC profiles as the colours are not correct. If you look at image 2 - the print out looks almost brown/ blonde and not black. This is what initially made us think that we needed to use ICC profiles for sure, and when we did, the colours all changed.

Any suggestions? Happy to share screenshots etc of the prolfiles, and print settings.
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