Alois, I'm afraid it's not that simple!
Originally Posted by Alois Senefelder
If I remember correctly our year model shino had the position of the No 1 ink form & water form changed slightly. And thinking back to conversations with the machine techs years ago they had a lot of issues trying to get them to run effectively (very sensitive to fountain solutions)
Also different size rollers in the dampening system, & likely different positioning.
I can say that I even tightened the metering roller to the point you couldn't go any further and it would still allow excessive fount to pass through the nip at one point or another during running, EG: a 1" portion would flood the rest fine.
Standard metering roller duro for this machine is 30 - 32 shore A, so perhaps the drop to 20 is too much.
I'm going to the 25 duro and these 20 duro can sit in the cupboard.
I hope you !
A PDF that I hope you will find of interest, seeing that Shinohara Presses have a 3 roller dampening sytem.
Regards, Alois - Dahlgren damping and Perfection on a Planeta Super Variant
I have had success with a dual durometer metering roller. (Rubber in the pan)
Diamond Spiral Roller.jpg
just my thoughts..
What does dual durometer mean?
The spirals on the roller are different Hardness/softness. Never used one but it looks interesting.
Can you please indicate what type of machine and dampening system you had success with? also the fountain solution used. In addition, are you using any filteration?
Originally Posted by tkemerly
I have used the roller on both sheet-fed and web, mostly for UV and EB inks, (Have ran conventional as well).
KBA 104, KBA 105, Hamiltons, both 32 and 40 size, Stevens, MLP 40 inch, Drent 850. are just a few.
Diamond does not push as a sheet-fed roller but I have went and used it with good results.
It does not show circumferential comb or cord striping like other rollers do after they have some time on them.
Using filtration down to 30 microns multi stage and single stage.
Several Prisco lines, but mostly Amerikal SF and WO Plus. (No alcohol, have not ran any for about 20 years)
The roller holds up very well to what it is subjected to and as well stays cleaner about 2xs longer before having to be cleaned.
Hope this helps...
Hello fellow Lithographers,
I'm dubious of the merits of the Diamond Spiral Roller
A PDF of a Spiral Roller from the 1950s - which proved - disappointing
We tried the spiral damps on Komori's with no luck at all. The Komori damp metering rollers serves two functions as a metering roller and also as a water transfer rollers. We had rollers made to spiral left, right, double spiral to spiral from the center on out and double spiral from the outside in. In all cases with this type of dampner the direction of the spiral always ran wet and the opposite side ran very dry to the point of getting dirty. You had no control. This was done with Amerikal SF fountain solution.
Originally Posted by tkemerly
Using the same fountain solution and the same type of rollers put them on other presses with where the spiral was used only as a metering roller and it worked fine.
Our conclusion was that the spirals cannot be used in a combo meter feeder position in dampners such as in the Komori.
Last edited by Green Printer; 09-25-2012 at 09:41 AM.
Thanks for sharing your personal results!
Originally Posted by Green Printer