--- title: "CtS direct exposing Technology | Grünig-SignTronic AG" description: Computer-to-Screen direct exposing for screen printing screens. CtS technology for precise, film-free exposure of photo emulsions. image: https://www.grunig-signtronic.com/images/og-image.jpg --- > Documentation Index > Fetch the complete site index at: https://www.grunig-signtronic.com/llms.txt > Use this file to discover all available pages before exploring further. # Computer-to-Screen (CtS) From digital pixel directly onto the mesh Digital direct exposing redefines the limits of screen printing. By eliminating physical films, the path from design to screen is drastically shortened. UV LED technology transfers even the finest structures onto the screen with a sharpness that analog systems cannot physically achieve. The result is uncompromising image reproduction with maximum time efficiency. Lossless image transfer Every raster point is written directly into the emulsion without scattering losses. This ensures sharp edges and gradients that remain stable even in complex high-end applications. Setup time elimination Manual handling, positioning and alignment of films are completely eliminated. Digital data transfer accelerates prepress workflows and increases flexibility for small batch production. Perfect color registration Software-controlled image positioning ensures micrometer-precise alignment. Registration deviations between colors are systematically eliminated, reducing waste in printing. ## Digital high-end exposing without compromise Maximum wavelength flexibility through DMD and LED\_Q4 Our CtS technology is designed for maximum versatility and speed. While conventional systems often reach chemical limitations, our LED\_Q4 light source covers the full spectrum required by modern emulsions. Controlled by millions of DMD micro-mirrors, a high-contrast exposure image is created. Integrated laser registration ensures process reliability by verifying the frame position twice before exposing – guaranteeing perfect results for every screen. ### LED\_Q4 multispectrum Up to four freely combinable wavelengths (365/385/395/405 nm) ensure optimal curing for any emulsion. With over 10,000 operating hours, the system sets the benchmark for industrial reliability. ### DMD modulation Digital light control ensures sharp details without scattering losses, resulting in highly stable screen edges for long print runs. ### Dual screen registration An integrated laser verifies frame positioning through double measurement, eliminating human errors during loading and ensuring perfect image alignment. Process ## From data file to finished screen 1\. RIP & digital masking Image data is transferred directly from the RIP server to the DMD mirror array. This replaces the entire conventional film production process. The exposure mask is generated digitally, eliminating image loss caused by film distortion or light scattering. 2\. Laser positioning alignment After loading the screen, a laser scans the frame position twice. The system calculates the exact reference point and automatically aligns the digital image. Manual film alignment and visual registration checks are no longer required. 3\. Direct UV projection The LED\_Q4 light source projects UV light via millions of digitally controlled micro-mirrors (DMD) directly onto the mesh. Without glass or vacuum, errors such as dust inclusion, Newton rings or poor contact are eliminated. 4\. Multispectral polymerization By combining up to four wavelengths, the emulsion is cured instantly and uniformly throughout its depth. Precise energy control ensures sharp edges and high mechanical durability. The screen is immediately ready for washout. Portfolio ## StencilMaster CtS Systems From compact stand-alone systems to fully automated IN-LINE solutions for every production requirement [](/en/products/cts/stm-one) ### STM-ONE Compact CtS system for small to medium screen volumes with an attractive entry price. [View product](/en/products/cts/stm-one) [](/en/products/cts/stm-tec) ### STM-TEC High-performance CtS system for technical applications with high exposing speed. [View product](/en/products/cts/stm-tec) [](/en/products/cts/stm-micro) ### STM-MICRO Compact solution for small formats with optimized handling and high exposing quality. [View product](/en/products/cts/stm-micro) [](/en/products/cts/stm-tex-series) ### STM-TEX SERIES CtS systems for textile applications in multiple machine sizes and formats. [View product](/en/products/cts/stm-tex-series) [](/en/products/cts/stm-d-series) ### STM-D SERIES Modular CtS concept for large frame formats – expandable up to full IN-LINE integration. [View product](/en/products/cts/stm-d-series) [](/en/products/cts/stm-xl) ### STM-XL Large-format CtS system for very large frames in landscape or portrait configuration. [View product](/en/products/cts/stm-xl) [](/en/products/cts/stm-in-line) ### STM CtS IN-LINE OPTION Modular automation concepts ranging from loading stations to fully automated, print-ready screen production. [View product](/en/products/cts/stm-in-line) Consulting & Contact ## Discover CtS technology Consulting for Computer-to-Screen direct exposing. Whether stand-alone or IN-LINE – we support you in selecting the right StencilMaster CtS solution. Together, we define the optimal configuration for your requirements. 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