John Arneson
Well-known member
George John, Alois Senen Felder,
Sirs;
Before you beat me up too bad, let me explain myself a little bit here. I have been at war with this picture framing problem for 18 months. I began to believe that this was a chemistry problem, in agreement with Kormori, Fuji, and Prisco. I did all that was asked of me to no avail.
At one time I was installing a new set of rollers, and decided to make damn sure that all the coppers were free of any contaminants. I hand washed all of the copper rollers beginning with:
Steel Roller De-oxidizer (Hydrochloric Acid)
Chrome Roller Cleaner ( Phosphoric Acid)
Followed up with lots of hot water.
I run a calcium rinse ( sulfamic acid) weekly if not more, and finish every wash up with a 50/50 vinegar and water rinse.
My rollers are clean and velvety. The press prints a clean sharp dot, it holds color, and I rarely have to adjust water even during the longest runs.
It is just picture frames.
ALOIS,
If this means anything to you,
I had a set of plates made from film to see what would happen. Unfortunately the same results.
When I finally gave up on the chemical war and started focusing on the mechanical aspect of the problem, things began to improve. Not cured, but improved significantly.
It is now my belief that there is something wrong with the dampening system. It could be either the gear ratios or the drive in the dampening motor.
I have improved things by changing the circumference of the water form and the nip pressures on all rollers.
Thank you for your time and input. Sirs.
John
Sirs;
Before you beat me up too bad, let me explain myself a little bit here. I have been at war with this picture framing problem for 18 months. I began to believe that this was a chemistry problem, in agreement with Kormori, Fuji, and Prisco. I did all that was asked of me to no avail.
At one time I was installing a new set of rollers, and decided to make damn sure that all the coppers were free of any contaminants. I hand washed all of the copper rollers beginning with:
Steel Roller De-oxidizer (Hydrochloric Acid)
Chrome Roller Cleaner ( Phosphoric Acid)
Followed up with lots of hot water.
I run a calcium rinse ( sulfamic acid) weekly if not more, and finish every wash up with a 50/50 vinegar and water rinse.
My rollers are clean and velvety. The press prints a clean sharp dot, it holds color, and I rarely have to adjust water even during the longest runs.
It is just picture frames.
ALOIS,
If this means anything to you,
I had a set of plates made from film to see what would happen. Unfortunately the same results.
When I finally gave up on the chemical war and started focusing on the mechanical aspect of the problem, things began to improve. Not cured, but improved significantly.
It is now my belief that there is something wrong with the dampening system. It could be either the gear ratios or the drive in the dampening motor.
I have improved things by changing the circumference of the water form and the nip pressures on all rollers.
Thank you for your time and input. Sirs.
John