Plates Tinting up on Press

[twitch5253]

tinting

tinting

we fought with tinting for a year after switching to CTP and Fuji's non chemistry plate. They kept promising us a better plate, but we ended up switching to Agfa plates with a wash/gum processor and it went away. The Fuji plates built up with ink on the blankets wherever the paper wasn't - look closely and you will find tinting printing on the paper too, I'll betcha. The shadows tended to plug up and the press had to run extra water - which meant extra ink to make a good transfer. 'Green' usually means lowering the plate / press / chemistry tolerances, and if you fall out of the tolerance window - you hit the ground!

 

[botas]

HI Guys

We sell the Agfa AZURA plate under the Heidelberg Saphira Brand, the product is excellent and it works well. When we started 3 years ago selling this product we had numerous problems with the plate and as mentioned it's always the Prepress departemnt.We are lucky that we have a specialist that kowns the press and Prepress .....very few in the world left over.
The problems we have encountered are as follow Pressroom Chemicals,roller pressures ,rollers on the processor worn out and not cleaning the plate..... the other issue is expiry dates after the expiry date max 6 months and then you land up with a tint in the background.
We have expoused plates that have expired from 1month to 8 months and we kept a graph of these plates where we see the plate slowly deteriorate thats why we say from date of expiry 6 months max and then the problems are clearly picked up.

 

[Leo@HUS]

Has the Problem been solved

Has the Problem been solved

Packin'JP,

Hi,

The HB guy found that there were no plates in stock of the lot number you had problems with.
Can you explain what was changed at press? Most plate problems are really not plate problems but press problems.
I can say this since I have been a Press guy for 38 years and a Plate guy for the last 2.

Leo@HUS

 

[Packin'JP]

I would like to clear the air with all my buddies at Heidelberg. I, in no way , shape or form, am being sarcastic in any way. I meant what i said.

I received a phone call the other day from someone at Heidelberg who saw my post, asking me if i was not being NICE.

Statement posted in earlier post:

"UPDATE:
Thanks for all your responses and help my fellow forum dudes, and also Heidelberg's support team, once again right there were I left them last. THANKS HB. TOP NOTCH SUPPORT, i don't care what they say about you. LOL"

It seems that someone down there in Georgia thought i was being a wise ass.
I work, play, live, and was born here in NYC. If I have something not nice to say, I will let you know.
I can't believe that some of you took the statement the wrong way. Lighten up people. You guys have been fantastic. Your support and service are unmatched and myself and my company are very pleased with you.

If i offended anyone down there i am truly sorry. There is no need to read between the lines.
It's allll GOOOD!!!!

Like i said in the last post, will be sending another plate into the press room this week, I'll let you guys know.
TO BE CONTINUED......

 

[padraig]

plate scumming

plate scumming

In all my years running offset(litho) presses and the scumming or tinting problems I've come up against, 99 out of a hundred times it's been a problem with the ink attacking the plate and sensitizing the non-image area (mostly magenta). I have used a product from 3M called simply Plate Cleaner. When that didn't work, I had a new plate made and rinsed it several times to make sure there was no plate developer left on it.
My 2 cents worth

 

[marktonk]

Hey Packin'JP,

I guess the comment can be misinterpreted but just want to say I glad it is as you state and want to say thanks for your business and support!

Best regards,

Mark

 

[FaustoMariani]

Plates Tinting Up on Press

Plates Tinting Up on Press

Tinting only in one edge, can be microlines showing on press due to "out of focus" of CtP devices, typical on chemistry free plates calibration. Have a look carefully on the plate comming out of CTP devices, trying to develop it manually on the critical edge.

 

[Packin'JP]

Your Welcome Mark. It is a pleasure working with you guys.