4P creates standard for laser-engraved cylinders

Using laser-engraved gravure cylinders without fingerprinting or additional expense

4Packaging building
Comprehensive know-how in printing implementation is an expertise of 4P Image hell Heliograph

4Packaging, a pioneer in laser engraving and an expert in printing technology implementation, has succeeded in harmonizing the printing characteristics of classically engraved and laser-engraved cylinders and thus standardizing laser engraving. In future, the printer will be able to run individual cylinders from the color set or a complete color set with laser-engraved cylinders without additional fingerprinting.

4P Cellaxy engravers
As a pioneer in laser-engraving 4P is equipped with 3 Cellaxy Photo: hell Helioscope

Laser-engraved rotogravure cylinders impress with sharp-edged text. The smoother ink-layer leads to a high-quality ink application, and half-tones are reproduced with greater nuance and contrast. These are all reasons why laser-engraved cylinders are increasingly in demand for high-quality packaging. 4Packaging has now developed a process that greatly simplifies the conversion to laser-engraved cylinders for the printer.

4P cylinder premium prep
Unique is the automated premium preparation of laser-engraved cylinders Photo hell Helioscope

4P has been producing laser-engraved gravure cylinders for 15 years and is thus a pioneer in laser engraving. The premium preparation of laser-engraved cylinders used at 4P deserves special mention. The fully automated line is unique in this way and creates the prerequisite for perfect reproducibility.

Identical LAB values for laser & classically engraved cylinders

The many years of experience in the use of laser-engraved cylinders as well as the comprehensive know-how in printing technology implementation now enable 4P to match the printing characteristics of classically engraved and laser-engraved cylinders and thus standardise laser engraving. The previously required additional fingerprint for laser-engraved cylinders is no longer necessary!

The proof of success was recently provided for several packaging jobs. Previously, these jobs were based on classically engraved cylinders. Now 4P supplied one set each of laser-engraved half-tone and linework cylinders. The standard ink formulations for classically engraved cylinders were used for printing. The result showed identical LAB and density values for all tonal values.

In the run-up, 4P had adapted the laser engraving to the classic engraving in terms of printing technology. For this purpose, a customer-independent adaptation was developed for each screen and screen angle. The customer-specific print adaptation was only carried out during laser engraving by means of the usual helio-gradation, which is also used identically in classic engraving.

Thanks to the newly developed standardisation, the printer can now use the advantages of laser engraving more easily, as the same fingerprint is used as for classically engraved cylinders. The standard ink formulation remains unchanged. The printer can now run individual cylinders from the color set or the complete set of laser-engraved cylinders.

From the helioscope Newsletter issue 04 – 21

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