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Archived This topic has been archived. Information and links in this thread may no longer be available or relevant. If you have a question create a new topic by clicking here and select the appropriate board.

‎03-13-2019 11:00 AM

HP Recommended
Product: HP designjet 5500
Operating System: Mac OS X 10.10 Yosemite

Hello, 

hope everyone is keeping well! 

 

I have the following issue on HP Designjet 5500:

Sometimes there are tiny (almost invisible) CMYK dots on the prints. At first, they look like grey dots, very small .. spread on my whole print, but when I use the magnifying glass to look closely, they are definitely in all colors. 

 

Here is an example of what actually happened: 

We are printing exhibition stand. Each stand is divided by panels and I am using the Designjet to print everything on 200gr paper. Today had to print a stand which had 5 panels, all of them plane white and logo in the middle. 

When the print was finished I spotted them dots on the panel which was supposed to be plain white. I still shipped that to the customer, because it is almost invisible, but I know about the problem and I can't solve it.

It is happening on random prints because it was not on the other white panel. 

I double checked the artwork to make sure the problem is not there and I the guarantee the file was completely empty. there was nothing there that might cause the problem. 

 

PS: I am changing print heads regularly and I am using original HP inks. 

 

Does anyone know anything about this?

Please advise. 

 

Thank you very much for your time. 

 

Kind regards, 

Preslav

 

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