Kraft Paper Corrugated Mailer Box Digital Proofing Principle: Choose A Suitable System For Proofing

Kraft Paper Corrugated Mailer Box Digital proofing principle: Choose a suitable system for proofing

 

What proofing system is used for what purpose

To correctly evaluate and select a system suitable for a particular application, the most important thing is to find out what kind of proofing capabilities are available in the market today, to understand the accuracy required by customers, production conditions, and the advantages and disadvantages of various digital proofing technologies. There are currently three levels of proofing, each with its own different performance requirements for different printing qualities.

 

1. Final proofing

Binding Proof is one of the fastest developing proofing methods in terms of technology and products, printers can rely on it to achieve reliable and accurate purposes, it can maintain absolute accuracy and stability in data collection, image quality and color matching. At the same time, it is a reliable production tool.

 

2, pre-press proofing

Prepress Proof can be used to check the process flow and production process. Where color and image quality permit, prepress proofing can also be used as a final proofing to check parameter Settings and assembly positions.

 

3, copy proofing

Copy Proof is the color proofing performed in the initial stage of the production process, which only requires the color of the proof to reproduce the design. And copy proofing can just make the design visible.

 

Digital screen proofing system

The use of digital mesh proofing for final proofing has begun and is growing at an annual rate of 20%. This growth is due to the fact that its quality, flexibility and stability exceed that of traditional analog proofing, and it has more interfaces and a more open process.

Does the tonal range of the proof correspond to the printed sheet?

 

There are two important reasons to distinguish the different digital screening proofing systems, which are particularly important for the final proofing. The first is the proofing system's ability to reproduce the full range of tones. CTP can handle the tone range is wider than the printing tone range, and the printing press can maintain normal operating parameters when the CTP system is used normally. To prevent the loss of 1% to 2% of the dot, the most important thing is to choose a proofing system that can reproduce this high-light dot stably.

 

Does the dot expansion of the proof correspond to the printed sheet?

The second important basis is how much dot expansion there is compared to printing. Additional dot expansion in simulation proofing is to be expected and can be eliminated by properly adjusting the tone curve. Although dot expansion is easy to control in practice, optical (visual) expansion can still cause printing difficulties. Some simulation proofing systems cause an overall expansion of more than 25% in the intermediate region, and more than 60% of this expansion comes from optical expansion.

 

This situation is difficult to change in analog proofing, and unfortunately the same problem exists in some digital screening proofing systems. Although, some adjustments can be made by adjusting the mechanical dot expansion. However, this control is very limited in the strict highlights and high profile parts. On the other hand, when the optical dot expansion of the proof is small, it can naturally match the printing conditions without changing the tone curve.

 

Configure the digital screen proofing system

There are several key factors to consider when choosing a final proofing system:

1. Network structure

The market definitely needs economical screen proofing, because screen proofing provides the best process control method and a simple and easy way to adjust the press. There are reports that because the use of screen proofing can make intelligent decisions, printing plants can save 30% to 50% of the preparation time. As a result, users often no longer accept continuous tuning as the final proofing.

 

2. Add the number of network cables

At present, most proofing systems on the market are mechanically limited in the Angle of the mesh that can be proofing. When choosing a digital screening proofing system, the most important thing is to see whether the system can reproduce the mesh Angle and network structure used in the production process, including ordinary network and frequency modulation network.

 

3. Consistency

The correct final proofing system must be able to provide consistent proofs. The output proofs should reproduce the same color even at different production sites, and must be done with minimal color management and operator intervention. To establish this consistency, the color correction between jobs must be very stable and not require frequent recalibration. In order to ensure high accuracy in the final proofing, the digital screen proofing system should be able to select a variety of industry standard colors, including SWOP, GRACol, European Color Standard, Japanese Color Standard and Pantone six color system. The ideal system also offers pure pigment inks and specialty inks, such as metallic inks and opaque white inks.

 

4, pigment ink

Digital screening proofs using pigment inks are better than dye-based proofs. Pigment inks are more stable, brighter and do not follow color quickly. In addition, because pigment inks can also be used in printing presses, more accurate color matching can be achieved.

It is necessary to study the dot expansion of different digital screening proofing systems in order to determine the minimum value of dot expansion and determine the influence of different coatings and coating materials on the dot expansion value within the acceptable range. Make sure that the proof matches the printing effect after making plates through CTP, and has a smaller dot expansion like traditional printing. The proofing system should be able to minimize dot expansion, so that it is as close to the final printing effect as possible, and maintain 1% to 3% of the dot.

 

5. Paper

Making proofs on formal printed paper usually results in more authoritative proofs. Digital screen proofing system through its very close to the printing process of the image processing, the copy of the proof can be a good preview of the subsequent printing results. The proofing directly on the paper allows users to see the printing effect on different grades of paper.

 

Production process digital screening proofing system is not only a peripheral equipment, but also an integral part of the production process. An option should be provided to connect the digital mesh proofing system to the existing front-end system by setting it up as a network printer or by connecting directly to an existing RIP. Examples of such workflows include Agfa Apogee, Harlequin Script Works, Scitex Brisque, and Heidel berg Prinergy.

 

Final proofing is changing dramatically, and digital mesh proofing systems are making this change faster in working practice. Choosing the right digital proofing system is the core issue that needs to be decided in order to survive and make a profit. Make sure that the digital screen proofing system on the market meets your strict requirements. If you make the wrong decision, you will reduce the output and quality of your products; If you make the right decisions, your CTP system will reach its full potential