Anilox Blistering

Ask or answer questions related to the flexo pressroom environment

Moderator: Frank Burgos

Anilox Blistering

Postby maryspec » Mon Apr 17, 2017 3:45 pm

Has anyone ever heard or seen an instance where water based ink caused anilox blistering?
maryspec
 
Posts: 2
Joined: Mon Apr 17, 2017 2:50 pm

Re: Anilox Blistering

Postby dkelley » Mon Apr 17, 2017 3:55 pm

I have see this in some anilox's that we use for coatings. We have resolved the issue by having the anilox supplier add an extra barrier coat to the anilox.
dkelley
 
Posts: 221
Joined: Fri Jan 08, 2010 12:26 pm

Re: Anilox Blistering

Postby Frank Burgos » Mon Apr 17, 2017 4:09 pm

You situation is rare, rare, rare, in my experience.

I have seen this, but only with chrome-plated copper-based rollers, which most people aren't old enough to remember. Because of the dissimilar metals and water-based ink solution, an electrolytic effect takes place, like reverse chrome-plating.

I have not seen this with ceramic rollers, no matter how old. If this is happening, I suspect a manufacturing defect. specifically, one where the ink is reaching the base, under the ceramic. That's a no-no, and to dkelly's point, a proper coating would avoid this, as, I might add, an impervious ceramic surface; impervious because it is well made.
Frank Burgos
Site Admin
 
Posts: 897
Joined: Wed Dec 31, 1969 8:00 pm
Location: North Carolina

Re: Anilox Blistering

Postby dkelley » Tue Apr 18, 2017 9:24 am

Just to be clear I have only seen the blistering with the Apex GTT anilox rolls.
dkelley
 
Posts: 221
Joined: Fri Jan 08, 2010 12:26 pm

Re: Anilox Blistering

Postby Frank Burgos » Tue Apr 18, 2017 9:34 am

Very interesting. I used to sell Apex rollers.
Frank Burgos
Site Admin
 
Posts: 897
Joined: Wed Dec 31, 1969 8:00 pm
Location: North Carolina

Re: Anilox Blistering

Postby Fuzz » Tue Apr 18, 2017 10:07 am

I have seen this on ceramic rolls. Looks like little half moons. I was told exactly what Frank said. Bad ceramic coating. Ink and solvents getting underneath it. And for the record it was not Apex rolls but another reputable manufacturer.
Fuzz
 
Posts: 250
Joined: Mon Jan 19, 2009 4:37 pm

Re: Anilox Blistering

Postby maryspec » Tue Apr 18, 2017 10:47 am

How did you resolve the issue @Fuzz?
maryspec
 
Posts: 2
Joined: Mon Apr 17, 2017 2:50 pm

Re: Anilox Blistering

Postby Fuzz » Tue Apr 18, 2017 2:17 pm

Not that it was a common occurrence. Sent the rolls in to be recoated and re-engraved. Not much else you can do. Now if this is happening with a lot of your rolls I'd say switch suppliers or evaluate your cleaners and cleaning procedures.
Fuzz
 
Posts: 250
Joined: Mon Jan 19, 2009 4:37 pm


Return to Pressroom

Who is online

Users browsing this forum: Bing [Bot] and 1 guest

cron