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So far flexo•expert has created 21 blog entries.

What’s the best dot shape for flexo?

There are different dot shapes for screening: round, square, euclidean, elliptical, ... which one is the best for flexography? When choosing the dot shape for plate screening, it is important to consider the characteristics of the different geometries and their influence on the printed result. When the plate is inked by the anilox roll and [...]

By |2018-11-11T15:33:38+00:00November 8th, 2018|Categories: Plate making, Prepress, Print|Tags: , , |0 Comments

Best resolution for images in flexo?

What is the best resolution for images to be printed in flexography? Well, it depends first of all on the distance that the printed product will be looked at by the viewer: this will determine the suitable linescreen that the image will have on the printed product. A general guideline for AM screening defines a [...]

By |2018-11-09T15:06:08+00:00November 8th, 2018|Categories: Plate making, Prepress, Print|Tags: , |0 Comments

How many resolutions?

How many resolutions do we need to know in flexography? There are four important information related to resolution within the flexo workflow. 1# The resolution of the anilox roll, or its line-screen or cell-count, that is the number of cells engraved on the surface by linear unit of measure. We express it, in the metric [...]

By |2018-11-09T14:56:33+00:00November 7th, 2018|Categories: Design, Plate making, Prepress, Print|Tags: , , , , , |0 Comments

Flexography to benefit from recent ISO standards

Flexography will definitely benefit from latest ISO standards on Graphic technology: ISO/PAS 15339-1:2015 - Printing from digital data across multiple technologies - Part 1: Principles ISO/PAS 15339-2:2015 - Printing from digital data across multiple technologies - Part 2: Characterized reference printing conditions, CRPC1-CRPC7 ISO 17972-4:2018 - Colour data exchange format (CxF/X) - Part 4: Spot [...]

By |2018-08-30T12:12:20+00:00August 30th, 2018|Categories: Prepress, Print, Workflow|Tags: , |0 Comments

Screen angles in flexography

Have you ever wondered why we need to use different screen angles in flexography? First of all we need to remember that we consider the screen angles when we look at the final printed product, so the parameters we set in the prepress/imaging workflow are meant to obtain the angles as described. Then we need [...]

By |2018-07-28T21:53:10+00:00July 28th, 2018|Categories: Prepress|Tags: |0 Comments

What does “isolated dot” mean?

The information about the size (typically the diameter) of the minimum isolated dot refers to the characteristics of the plate and it is normally completed with the term positive and/or negative. Example: Minimum positive isolated dot: 100 µm Minimum negative isolated dot:  50 µm The minimum isolated dot size indicates what is the ability of [...]

By |2018-07-28T10:23:44+00:00July 27th, 2018|Categories: Plate making|Tags: |0 Comments

Slur: the sneaky enemy of print quality

Slur is characterised by the smearing of the printed image: the dots are distorted in printing direction, typically elongated, and exhibit an oval shape. This condition is caused by slippage at the point of contact and impression between the plate and the substrate and/or even the plate and the anilox roll. The printed image [...]

By |2018-07-30T00:04:26+00:00July 26th, 2018|Categories: Print, Troubleshooting|Tags: |0 Comments

Where does print happen?

It is important to know in depth the technical characteristics of the printing press, and especially the configuration of the cylinders. Their diameters, combined with the gauge and the resilience of the plate, of the mounting tape and of the substrate, will determine whether the print will happen in the right position, without slurring, [...]

By |2018-07-30T10:46:29+00:00July 25th, 2018|Categories: Print, Workflow|Tags: , , |0 Comments

Fear of ghosts?

With the term "ghosting" we describe the presence of a faint image of a design that shows in areas where it was not intended to appear. Usually it is a repeated pattern on print along machine direction. The main cause is attributable to the failure of replenishing, with fresh ink, the cells that discharged [...]

By |2018-07-28T10:28:30+00:00July 24th, 2018|Categories: Print, Troubleshooting|Tags: , , |0 Comments

What does “minimum dot” mean?

The information about minimum dot indicates what is the size of the minimum printing dot that appears on the plate. This size is normally expressed in microns (µm), or, less commonly, as a percentage of a given linescreen, and it is set as a threshold in plate imaging to obtain such size on the finished [...]

By |2018-07-27T22:44:23+00:00July 22nd, 2018|Categories: Plate making, Prepress|Tags: , , |0 Comments
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