Integrating Handheld Spectrophotometers into Automated Color Control Systems for Offset Printing

Integration of handheld spectrophotometers into automated color control systems for offset printing no longer has to break the bank. The PressLink has 3 different configurations, each with different price points, which opens the door to closed loop color control for all. PressLink Basic utilizes the SpectroDens, which is an entirely handheld device. The PressLink Advanced utilizes the SpectroJet, which is a spectrophotometer that can be manually pushed on a track or used as a handheld device. Finally, the PressLink Premium comes with the SpectroDrive, which is fully automated and runs on a motorized track.

Understanding Handheld Spectrophotometers

A handheld spectrophotometer is a device that has been designed to improve your color control process as well as the collection of your color data. These devices play a large role in color management in your press room, specifically with the use of Techkon’s new color management software, ChromaQA 6. These handheld devices also have a few advantages when compared to automated devices. The handheld spectrophotometer, such as Techkon’s SpectroDens, can easily be transported, is cost-effective, and extremely versatile.It is important to make note that in the printing industry, handheld spectrophotometers are primarily used for color quality control and ensuring consistency across many different materials and print jobs. These devices assist in ensuring precise color measurement and high accuracy throughout many print jobs.

What Is a Handheld Spectrophotometer?

 Handheld devices, such as Techkon’s SpectroDens, are lower cost solutions compared to other automated scanners. The SpectroDens is durable and rugged, as there are no moving parts, making it the perfect fit for harsh production environments. The SpectroDens can be picked up for fast and easy “spot check” measurements. This device is a combination of a spectrophotometer and a densitometer and has been designed for press operators who need more than just density readings. Densitometers measure the density of a printed sample, which is the absorbance of an ink at different wavelengths. Spectrophotometers have the capability to determine if 2 colors match each other and quantify or determine the difference between 2 colors. A spectrophotometer works by measuring the intensity of light in a wavelength. The device passes a light source through a sample and detects how much light is absorbed or reflected at each wavelength. This light source is typically a white light source and is either LED or incandescent. 

Role in Color Management

Techkon’s SpectroDens was designed to fit seamlessly into your color quality control process. During pre-press, the MYIRO-1 can be used to create profiles for artwork and help press operators to be sure that what is seen on a computer screen will print the same on the desired material.

During make ready and production, Techkon’s new color management software, ChromaQA 6, helps to simplify workflows and strengthen quality assurance. After color measurement, color values are sent directly to ChromaQA 6. Press operators can then examine key print attributes like density, Delta E, TVI, G7, and more. This new color management software allows the production manager to keep track of each days’ results and determine the efficiency of each job. Accurate color management is important, and in order to ensure high accuracy, the SpectroDens removes the guesswork from color measurement.

Advantages of Handheld Spectrophotometers

Handheld spectrophotometers play a key role in maximizing efficiency and minimizing production waste in the press room. There are serval advantages to these devices, as opposed to automated devices, such as the SpectroDrive. For starters, handheld spectrophotometers are easy to transport and convenient to use. Because they are not connected to a track, the devices can be utilized for quick and easy “spot check” measurements. When deciding which spectrophotometer is the best fit for your press room, it is also important to consider cost. Handheld devices like the SpectroDens are a more cost-efficient option compared to many automated spectrophotometers. 

Portability and Convenience

Handheld spectrophotometers should be durable, to make them a good fit for the fast pace of a press room. A portable spectrophotometer, such as Techkon’s SpectroDens, is a handheld device that has no moving parts, an aluminum cast body, and a solid-state measurement engine. When working at a fast pace, convenience is important. The SpectroDens is equipped with large buttons, which are easy to see and press. Techkon’s SpectroDens is also able to be operated via cable connection to a computer, or by Wi-Fi. This means that the device can still be operated while being transported. A portable spectrophotometer should be sturdy and solid, like the SpectroDens. 

Cost-Effectiveness

Handheld devices, such as Techkon’s SpetroDens, are more affordable solutions compared to automated scanners, such as the SpectroDrive. These devices still guarantee precise color measurement and high accuracy, but at a lower price. Another option is Techkon’s SpectroJet, which runs on a precision track but can also be picked up and be used as a handheld device.

Versatility in Applications

The SpectroDens is compatible with most kinds of printed materials, which makes it extremely versatile. With the SpectroDens, press operators do not need to worry about compatibility with different materials as the device can measure rigid, opaque, or transparent materials. The SpectroDens is suitable for any light intensity and equipped to integrate seamlessly into various color quality control processes. 

Integration of Handheld Spectrophotometers into Closed-Loop Systems

Integrating handheld spectrophotometers into closed-loop systems is a cost-efficient way to gain real-time color analysis and automated adjustments based on readings. Techkon developed PressLink, which is a closed loop color management system that combines the Spectrophotometer and SpectroDrive with color control software. This software is installed with the press-side ink key console and moves the keys for the press operators. This helps to remove guesswork and reduce make ready times as well as waste. There are three different PressLink configurations: Basic, Advanced, and Premium. PressLink Basic utilizes the SpectroDens, while the PressLink Advanced utilizes the SpectroJet, and PressLink Premium comes with the SpectroDrive, which is fully automated and runs on a motorized track.  

Data Capture and Real-Time Color Analysis

The PressLink integrates hardware and software to collect real-time color data. While the press is running, color measurements are sent directly to the to the PressLink closed loop color management software.

Automated Adjustments Based on Readings

PressLink automates the ink key adjustment process, in turn ensuring that the precise amount of ink is applied to every single sheet of a print job. Before the press run begins, an Ink Presetting module in PressLink’s color control software will analyze the image and automatically open and close the ink keys on press. This makes sure that the printed densities will be even across all sheets and ink zones.

Benefits of Using Handheld Spectrophotometers in Automated Closed-Loop Systems

Utilizing handheld spectrophotometers in closed-loop systems (such as PressLink) can help press operators to improve color consistency across all print runs, reduce waste, save money, and enhance productivity, all at a moderate cost. Presslink Basic uses a manual/handheld device to scan color bars and send information directly back to the press operator. Being able to measure jobs throughout the print run and let a closed loop system like PressLink control the ink adjustments allows press operators peace of mind knowing that each run will be consistent across a job. By using a handheld spectrophotometer to measure the color bars on a job, and PressLink to adjust the ink on press, less waste will be produced. At the end of the day, this increases both efficiency and productivity. 

Improved Color Consistency Across Print Runs

PressLink uses real time color measurements to automatically adjust the press’s ink keys, which removes the need for human intervention. This ensures consistency and high accuracy across all print runs. Utilizing a closed loop system, like PressLink, with your offset press increases consistency across print runs, and between different press operator shifts. 

Reduction in Material Waste and Cost Savings

Every minute a press is running when it is not “in color,” more material waste is being produced, and more money is being wasted. By utilizing PressLink to automatically adjust ink keys and measure color during a run, press operators will get “to color” more quickly, and be able to maintain color throughout a run more easily.”

Enhanced Efficiency and Productivity

Just as closed loop systems such as PressLink save press operators and printers money, it can also save time. The SpectroDens and PressLink help to provide precise measurements and make timely adjustments to the ink keys. The more time the press is “in color,” the more efficient a run will be. This reduction of waste will increase productivity and save time.

Key Considerations for Implementation

When choosing the handheld spectrophotometer that is right for you, there are several considerations to consider, such as cost. It is also crucial to understand the importance of maintenance and calibration, as this is necessary to ensure that your device continues to function properly. Training is another important consideration for implementation of a handheld spectrophotometer into your press room. Techkon offers hand-on extensive training to ensure that all press operators and managers feel comfortable with the device.

Choosing the Right Handheld Spectrophotometer for Offset Printing

Choosing the best handheld spectrophotometer for offset printing does not have to be a daunting task. If you are looking for a closed loop system for your offset printer, but are concerned about the cost, Techkon has you covered. The PressLink Advanced, with the SpectroJet, offers a solution with a moderate price tag. If you’re looking for an even  more affordable  option, the PressLink Basic with the handheld SpectroDens may be the best fit for you. When choosing a spectrophotometer for offset printing, it is also important to consider the types of materials to be measured, required measurement accuracy, portability needs, and compatibility with industry standards.

For a fully automated high-end Closed Loop system, the SpectroDrive allows scanning and adjustments with just the tap of one button.

Calibration and Maintenance Best Practices for accurate readings

With the SpectroDens 4 and ChromaQA software, calibration is no longer time consuming. Team leaders can manage the calibration status of an entire fleet of devices at once, by keeping track of which devices are due to be calibrated. There are two different types of calibration. The first is a “small” calibration and can be done to keep the device consistent during production. Operators simply place the device on the charger, which has a small white tile built in that the device is calibrated with. The other type of calibration is much more involved and must be done every two years. Operators must send their device to Techkon USA in Danvers, MA. This is free with the Planned Maintenance Program, and users will be sent a loaner device. If you are looking for a color reference tool to check the measurement accuracy of the SpectroDens, SpectroJet, or SpectroDrive, visit our website to learn more about the SpectroCheck.

When it comes to maintenance best practices, in order to maintain accurate color measurements with your device, it is important to  calibrate the spectrophotometer regularly and follow Techkon’s scheduled maintenance guidelines and check for software updates. It is best to keep the device clean, to avoid interference with measurements.  For more information about Techkon’s products, visit our website.

Training Pressroom Staff for Optimal Use

Techkon offers on-site training for press room staff who utilize PressLink color control software. This training allows users and managers to feel comfortable enough to efficiently use the system in their own production environment. By investing in a spectrophotometer, press operators can take the guesswork out of color matching, which no longer takes years of training to master.

Future Trends in Handheld Spectrophotometry

Spectrophotometry has come a long way since the 1940s. Today, industry professionals are looking ahead, and working to make handheld spectrophotometers faster, more accurate, and maintenance free. When it comes to offset printing, closed loops systems, such as PressLink, have come a long way in assisting press operators. These devices will continue to be adapted, making the closed loop system an even better way of reducing waste and increasing efficiency.  

Technological Advancements in Spectrophotometry for Printing

The precision of spectrophotometry has come a long way. Techkon’s high-precision handheld spectrophotometers, such as the SpectroDens, take 3,000 measurements in one second.  In the world of closed loop spectrophotometry, press operators can scan more points per spot, which makes the average of those spots even more precise. 

AI & Machine Learning in Print Color Management

ChromaQA with SmartInk allows operators to tone ink with just a few clicks of a button. Operators simply define their specific base ink sets and substrates, which is a one-time process.  After this, AI driven algorithms use the given information to correct ink in order to get within a certain Delta E tolerance. Techkon’s PressLink has ink pre-setting optimization capabilities which allows the software to calculate ink profiles before a job starts.  The PressLink software is able to keep track of how each job starts and finishes, which then allows it to re-align the algorithm when needed.

Choose Handheld Spectrophotometers for Better Color Quality 

Print quality control is important, and handheld spectrophotometers can help you achieve it. With Techkon’s PressLink, printers have several options and price ranges they can choose from to find the closed loop system that will fit their needs best. If you are looking for precise measurements, consistency throughout print runs, the chance to minimize material waste, increase productivity and efficiency, a handheld spectrophotometer may be a great fit for you. For a list of all handheld, scanning, and inline spectrophotometers, visit out website.