General

Print is playing a work request with the highest fidelity possible. The nearer the requested both better the graphics professional who made it.
From this premise, and whatever the printing process, the key is in the pre-press, a term used to describe the process by which must pass a file before it is printed. The steps are required for printing to be successful. And the printing process is agile.
- The only way to make a good reproduction (printing) is starting from high resolution images.

indirect printing process from an array transfers the image to a rubber blanket, then to the printing surface, based on water and oil repellency, has planografica printing is not high or low relief . To transfer the image matrix (aluminum foil) receives ink from ink rollers, while the non-print area (contragrafismo) receives a water film (“fountain solution”), while the area that is not printed ink. Rotating modern fed by coils produce the graphics at high speed and are multi task and can print and online finishing.
Were introduced in the market in two stages – in 1875 by Robert Barclay of England for printing on flandre sheet (Can), and in 1904 by Ira Washington Rubel United States for printing on paper.

“RGB” refers to the primary colors of red, green and blue, standard for display on computer monitors and televisions in general. “CMYK” refers to the primary colors of pigment: cyan, magenta, yellow and black. The CMYK standard is used in printing machines to make every possible hue for color printing. Standard four primary colors, combined forming unlimited colors. The CMYK standard is mostly used for printing on paper, where 4 ink colors generate a final quality rather than just three.

Excessive fountain solution, wrong dosage of isopropyl alcohol or paint out of specification. Adjust the pH to 4.0 to 4.5, in 10% alcohol and check pressure.

It can be: irregular thickness of the blanket or not securely attached, barely strained substrate.

Check: calendering paper, roll parallelism, blanket mounted in the right direction, very important to check the uniformity of the thickness of the blanket.
Gain too high.
It can be: excess pressure, “tack” incorrect ink or lack of synchronization between battery water and ink, adjust ink water balance, temperature too high ink, inadequate blanket, coolant temperature.