Low Dot Gain. Again

[cementary]

I suggest you try changing the blankets. This may solve the problem. Or at least you will eliminate a variable.

How? We have same blankets on all presses. We've tried changing with new ones (all 4 at ones with packing of course)

 

[danremaley]

Have you tried adding reducer to print 'fuller' to match the other presses?
Grey Balance is achieved when Magenta/Cyan are the same midtone gain and Yelo is -2 (with ISO inks).
M/C-10 Y-8 = light grey
M/C-24 Y-22 = dark grey

 

[cementary]

Have you tried adding reducer to print 'fuller' to match the other presses?

No, we didn't. Because it's hard to control proper amount of reducer.

 

[danremaley]

No, we didn't. Because it's hard to control proper amount of reducer.

How about this- you could increase the laser power on plates for that machine ( to increase dot size) or try another plate manufacturer that would increase dot size without changing the laser power.
. . .a little testing-
Dan 412.889.7643

 

[cementary]

How about this- you could increase the laser power on plates for that machine ( to increase dot size) or try another plate manufacturer that would increase dot size without changing the laser power.
. . .a little testing-
Dan 412.889.7643

You're joking, right? I was talking about interchangeability between 4 same presses.
Why on earth should i change laser power where i can easily change curves for the same outcome?
And again - tips and tricks on how to overcome it locally is not what i'm looking for.

 

[Asures]

You're joking, right? I was talking about interchangeability between 4 same presses.
Why on earth should i change laser power where i can easily change curves for the same outcome?
And again - tips and tricks on how to overcome it locally is not what i'm looking for.

How about shut the press down and distribute the work to the other three presses until you can get a authorized Roland mechanic in there to figure it out?

No one seems to satisfy your inquiry and I’m not sure you’ll ever find the desired responses you seek.

I wish you great success in your quest for your answer.