How is flexo printing distortion calculated?
The correct formula to use to calculate the flexo plate distortion is: Flexo distortion = (print repeat length – K) / print repeat length. e.g. For a plate with thickness 1.70 mm, base layer thickness 0.127mm and a circumference (vertical size) of 500mm, the flexo distortion factor becomes 98.021%.
How do I choose anilox?
Keeping the Anilox cell opening equal to or less than the minimum dot diameter will ensure you can achieve the desired quality of clean printing. This will ensure your anilox will deliver the right amount of ink to your plate and not over ink your minimum dots, avoiding what is sometimes referred as “dirty printing.”
What is flexographic printing process?
Flexography (often abbreviated to flexo) is a form of printing process which utilizes a flexible relief plate. It is widely used for printing on the non-porous substrates required for various types of food packaging (it is also well suited for printing large areas of solid colour).
What is a flexographic plate?
Flexographic plates, like letterpress plates, are relief plates with image elements raised above open areas. They are elastomeric in nature in contrast with hard letterpress plates. They are used in rotary presses and with low viscosity inks.
What is distortion in flexo?
About Flexo Print Distortion Distortion in flexographic printing occurs when the (relatively) soft material of the printing plate is wrapped around the hard cylinder while being mounted on the press.
What must a flexo plate cylinder do *?
‘Flexography’. On a flexographic press, the plate cylinder is the part of the press to which the rubber or photopolymer plate is attached. The plate is inked by the adjacent anilox roller, and transfers the raised images directly to the web of substrate passing between the plate cylinder and the impression cylinder.
How do you calculate the volume of an anilox?
Anilox: convert linescreen and volume
- Volume: cm³/m² = BCM/in² x 1,55 (*) BCM/in² = cm³/m² ÷ 1,55.
- Linescreen: l/cm = lpi ÷ 2,54. lpi = l/cm x 2,54.
- Abbreviations and habits: Volume in imperial expression (BCM/in²) is usually indicated only with the acronym BCM.
What is BCM in anilox roll?
Anilox Cell Volume. Cell volume is the capacity of the engraved surface in a square inch, expressed in billions of cubic microns (BCM). Higher volume translates to higher solid ink density, more color or a heavier coating thickness.
What is the difference between offset printing and flexographic printing?
Offset printing machines can print on materials such as; paper, metal, cardboard, cellophane and vinyl. The main difference with both processes is that offset printing is only done on flat surface while Flexographic printing can be used on almost any substrate with a flexible surface.
How do you identify flexography?
Flexography uses a rubber-like plate that, under pressure, transfers ink to the substrate. This results in type that often appear to be surrounded by a sharp-edged “halo.” The same effect, but in opposite, occurs in the halftone dots which may have dark edges and light centers.
How flexography plate thickness is measured?
Tool: Micrometer After the drying stage is complete, once again measure the plate thickness (micrometer) to insure the material is completely dry before moving on to post exposure and light finishing (detack). The plate should be swollen .