Printing solid colors on Mimaki CJV 150-160

[Kinkajou]

Hi guys, it's been a while!

I'm back here asking for some help with flat colors.
I have to print a yellow box (#ffe600) on top of which there is a black logo with black text (#00000). This is the file that was provided to me (pdf)
Now, if i print with my usual media profile, yellow came up a mess (dotted). So I decided to change the spot color to 100% Y only. The problem is the black. I can not in any way bring out the black well defined, with "sharp" edges.

In the past I've had issues with the print head that I eventually had replaced but it doesn't seem the same problem. I am currently printing a lot of heavy graphics once a week on Avery hi-tack, and they are all ultra defined. Now I'm having problems with these small stickers (8cm down to 3cm).

I rechecked the feed comp, temperatures, and drop pos, all normal.
I have limited the amount of ink output un to -35% but the problem persists.

I'm printing on Avery MPI 2800 HOP gloss with a Mimaki CJV 150-160 with SS21 inks.

Any advice? Thank you!

 

[Solventinkjet]

It's definitely just over saturating. I'd turn up the heat and try different profiles. It could be expired ink or bad media as well.

 

[dudeinthemoon]

Did you try to print it in unidirectional mode?

 

[Kinkajou]

Hi guys.
dudeinthemoon yes, no improvement.
Solventinkjet I remembered that I already printed years ago the same color combination on Avery vinyl. I searched for the ripped file and used the same settings... it worked.

Print with Mimaki GenericPVC profile (max res, 12 pass, MFD1, bi-directional, normal speed, -15% total ink, colors switched to l.a.b. values) worked. I started to think that maybe the cause was the compatible inks (I'm using Nazdar SS21 inks), but fortunately that wasn't the case!

Thank you for answering me