Colour Sequence...

[Disappointed]

Hi all,

What difference does colour sequence make to a job?

I know it does make a difference as a print engineer proved it with a hard-to-match purple when he swapped the Cyan and Magenta around and it worked much better.

We are still printing K – M – C – Y as he left it but what would Y – M – C – K do to the jobs?

The reason for asking is that since swapping C & M we get better purple and blue hues but also suffer very bad yellow contamination with cyan.

My suggested order would prevent any risk of contamination but I don’t want to risk it if it’s proven to be a bad idea.

Any views?

Dave

 

[rich apollo]

If you're going to continue running in the KMCY sequence you should look at an ink set that is tack rated to run in that order. You're getting the contamination, most likely, because your inks are tacked to run in KCMY sequence.

Another option would be to run uni-tack inks.

 

[CD102]

If you're going to continue running in the KMCY sequence you should look at an ink set that is tack rated to run in that order. You're getting the contamination, most likely, because your inks are tacked to run in KCMY sequence.

Another option would be to run uni-tack inks.

Or running more water on the yellow unit. Or reduce the tack of the yellow. And some people recommend weakening the yellow so you can run a bit heavier ink film.

 

[GJOHN]

The reason why you get a "blotchy" purple is because the 2nd down cyan is of heavy coverage and is almost printing a solid, so the 3rd down magenta cannot print sharp on top of it. When you print magneta 2nd down, it prints sharp. I know pressrooms that are running KMCY day in and day ourt without any yellow conatmination.
George John
269-216-8088