Computer-to-Screen Technology: CTS Advancements & Best Practices | LWG
Taylor LandesmanModernizing the Screen Room: Advancements and Best Practices in Computer-to-Screen Technology
Learn how modern CTS equipment is improving screen room throughput, on-press registration, software workflows, and prepress consistency for commercial screen printing operations.
Computer-to-Screen (CTS), also called direct-to-screen imaging, has revolutionized screen printing prepress workflows by transferring digital artwork directly onto a coated screen. Unlike a traditional film-positive workflow, CTS can reduce film handling, improve repeatability, and create a more controlled prepress process. Over recent years, significant technical advances in CTS equipment have unlocked higher throughput, tighter tolerances, and reduced labor requirements. Understanding these developments, along with proper equipment evaluation, is critical for print shop managers seeking to maximize screen room efficiency.
Quick Answer: What Does Modern CTS Improve?
Modern Computer-to-Screen technology helps screen printing shops replace film-positive workflows with direct-to-mesh imaging, reduce manual prepress steps, improve repeatable registration, increase imaging throughput, support more specialized frame formats, and modernize software workflows. The best CTS investment depends on screen volume, press configuration, registration hardware, substrates, frame formats, software compatibility, and supplier support.
Modern Technical Advancements
Today’s engineering improvements in CTS equipment focus on eliminating manual bottlenecks, increasing imaging speeds, and expanding application versatility in a variety of ways.
One of the most impactful developments in modern CTS equipment is standardized on-press registration setup. Historically, CTS equipment got you closer than film with screen alignment to make on-press registration easier. With today’s technology, equipment manufacturers routinely pre-configure CTS units so that their internal three-point cornering systems match specific on-press registration fixtures of your particular press. This has allowed press operators to align screens on-press in under one minute, with experienced technicians achieving setup times as fast as 30 seconds.
Why Press-Matched Cornering Matters
When the CTS system, screen frame, cornering setup, and press registration fixture are configured to work together, the screen room is not simply imaging a screen—it is preparing a screen for a more predictable on-press setup. For the most repeatable results, the CTS imaging cornering system should match the pin-registration, pallet, or screen-location method used on the production press. That alignment can reduce registration time and help operators move through multicolor jobs more efficiently.
The type of usable frames for CTS has also expanded. Earlier generations of CTS systems were designed primarily for static standard frames, such as 20" × 24" and 23" × 31". Modern units feature physical and operational adaptations, such as custom cassette fixtures, to handle specialized screen shapes and sizes for things like 3-sided cap screens, along with bottle, pen, and other ASI-style printing. Before selecting a CTS system, confirm that it supports the frame sizes, mesh counts, and screen formats used in your shop, including standard aluminum frames, retensionable frames, cap frames, and specialty formats where applicable.
Throughput has increased substantially due to modern hardware advancements. Many current-generation systems utilize larger, wider print heads. These new print heads can be double or triple the size of previous ones, delivering faster imaging speeds per square foot. Additionally, newer print heads offer enhanced image resolution and line-art crispness. Fine text, line art, halftones, and detailed simulated-process work depend on the complete workflow: CTS resolution and droplet size, correctly prepared artwork, mesh selection, emulsion coating consistency, exposure settings, and washout technique.
Advancement in Software, Workflow, and Operating Systems
CTS hardware updates are accompanied by modernized prepress software architectures in a variety of ways. First, new CTS machines provide an easier upgrade path with today’s computer operating systems. Many people using legacy CTS machines are stuck using end-of-life operating systems, like Windows 7, because their CTS software does not operate on today’s platforms.
Modern CTS workflows depend on more than the imaging unit itself. RIP software, short for Raster Image Processor software, converts artwork into production-ready image data and helps shops manage halftones, spot-color separations, line detail, resolution, ink coverage, and job queues before a screen is imaged.
Today’s CTS software also has greater built-in capacities. For example, workflow automation, automatic file queuing, and automated hot-folder integration were not available in early CTS software.
CTS Terminology for Screen Printing Shops
Computer-to-Screen technology is part of a larger screen room workflow. Understanding these common CTS terms helps printers compare equipment, evaluate compatibility, and identify the factors that influence image quality, registration, throughput, and operating cost.
Computer-to-Screen / Direct-to-Screen Imaging
CTS is a digital prepress process that transfers artwork directly onto an emulsion-coated screen. It reduces or eliminates the need to output, align, store, and expose traditional film positives before screen imaging.
Film-Positive Workflow
A film-positive workflow outputs artwork onto transparent film, which is then positioned over a coated screen and exposed with UV light. It can add film, ink or toner, alignment, handling, storage, and output-device maintenance requirements.
RIP Software
Raster Image Processor, or RIP, software converts design files into image data for the CTS unit. It supports production controls such as halftones, spot-color separations, line detail, resolution, ink coverage, and job queuing.
Pin Registration and Cornering
Screen registration is the repeatable placement of screens so printed colors align correctly on press. Pin registration and CTS cornering systems establish consistent screen locations during imaging and during press setup.
Mesh Count and Frame Compatibility
Mesh count is the number of threads per inch in a screen mesh and affects ink deposit, detail, and the type of job a shop can produce. CTS equipment should be evaluated for frame sizes, mesh counts, and specialty screen formats.
Resolution, Droplet Size, and Halftones
CTS image quality is influenced by imaging resolution, droplet size, artwork preparation, mesh selection, emulsion coating, exposure, and washout. These factors affect fine text, line art, gradients, halftones, and simulated-process printing.
Coated Screens, Exposure, and Washout
CTS images a properly coated screen, but the screen still requires compatible exposure and washout steps to produce a durable stencil. Consistent coating, correct exposure settings, and proper washout preserve image detail and screen life.
Screen Room Automation
Screen room automation connects prepress, CTS imaging, exposure, washout, drying, reclaiming, and screen storage into a more repeatable workflow. CTS is one part of the system; the largest gains often come when imaging and press setup are planned together.
Evaluating Whether to Upgrade
Deciding when to upgrade or invest in newer CTS equipment depends primarily on production volume and equipment age. Print shops imaging fewer than 10 screens per day will see their ROI from a time and quality-of-life perspective in that CTS frees up their ability to focus on other tasks.
Screens Per Day
The value is often time, workflow consistency, and quality of life. CTS can free the team to focus on other screen room and production tasks.
Screens Per Day
A modern CTS unit can often produce a full ROI within 12 to 18 months through labor reduction, faster press setups, and film elimination.
Screens Per Day
For high-volume operations, the payback window can accelerate to approximately 6 to 9 months when the CTS system is properly matched to the workflow.
Conversely, repairing and maintaining legacy CTS hardware that is seven or more years old can become a poor financial driver, as these older machines may rely on obsolete operating systems, unsupported motherboard architectures, and lack the automated registration and speed required to stay competitive.
Simplifying the Screen Room
Implementing CTS technology fundamentally alters the skill requirements in the screen room. By automating positioning and file processing, CTS reduces reliance on high-level operator technical skills for prepress alignment. It also lessens the need for extensive, time-consuming training that used to be necessary for this critical step in the screen printing process.
Some modern CTS systems incorporate UV exposure bars directly inside the imaging unit. This design minimizes touch points and reduces required floor space. While reducing the number of times a screen must be handled, operating a standalone UV exposure system alongside a CTS unit allows for tailored exposure ranges and precise control over different emulsion formulations, providing maximum versatility across various mesh counts.
Selecting an Equipment Supplier
Because most current CTS units on the market offer reliable core performance, equipment selection often comes down to vendor support and consultative discovery. Print shops evaluating vendors should ensure the supplier asks thorough operational questions before recommending hardware.
A qualified CTS distributor should analyze key variables, including throughput requirements, substrate types such as textiles, industrial products, hard goods, and containers, along with press configurations and registration pin systems in place. Partnering with a supplier focused on operational fit rather than transactional sales ensures proper onboarding, training, and ongoing technical support.
Questions a Qualified CTS Supplier Should Ask
- How many screens do you image each day, now and at planned future capacity?
- What substrates and applications do you print: textiles, industrial products, hard goods, containers, bottles, pens, or specialty work?
- What press configurations, frame sizes, mesh counts, and registration pin systems are already in place?
- What CTS software, RIP software, operating systems, artwork workflow, and file-queue process do you use today?
- What level of onboarding, training, and long-term technical support does your production team need?
Ultimately, integrating modern CTS technology streamlines screen prepress from a manual bottleneck into a predictable, high-speed automated workflow.
Modernize Your Screen Room Workflow
Evaluate CTS equipment around your screen volume, press registration system, frame formats, applications, prepress workflow, and long-term production goals—not just a single speed specification.
Computer-to-Screen Technology FAQ
What is Computer-to-Screen technology?
How does CTS improve on-press registration?
How many screens per day justify a CTS investment?
Can CTS systems work with specialty screen formats?
Should a shop repair an older CTS machine or upgrade?
CTS capabilities, speed, frame compatibility, registration results, operating-system compatibility, software features, labor savings, and return on investment vary by equipment model, configuration, press setup, registration system, screen type, mesh count, emulsion, artwork, operator workflow, and shop conditions. Review your specific requirements with a qualified equipment supplier before making a purchasing decision.