Blue Positive UV-CTP Offset Printing Plate

1. What is the Blue Positive UV-CTP Plate?

The Blue Positive UV-CTP plate (Computer-to-Plate) is a light-sensitive printing plate based on violet laser technology (405nm), specially designed for UV ink printing environments. It is widely used in commercial printing, packaging, and label production.

This plate adopts a positive-working imaging system: after development, the unexposed areas are removed, while the exposed areas remain to form the image area. It offers high resolution, excellent dot reproduction, and strong durability, making it ideal for medium- to long-run printing jobs.

2. Core Characteristics & Working Principle

Material & Coating: The plate uses an electrochemically grained aluminum substrate (alloy grades 1050, 1060, or 1070), coated with a blue photodegradable layer containing diazonaphthoquinone (DNQ) and phenolic resin.

Imaging Process: When exposed to UV light (350–460nm), the exposed regions break down and dissolve in alkaline developer to become hydrophilic non-image areas, while the unexposed parts retain their oleophilic image-forming properties.

Blue Coating Advantage: The blue-sensitive layer provides high visual contrast between exposed and unexposed areas, allowing for easier inspection and alignment during the plate-making process.

3. Key Technical Advantages of the Blue Positive UV-CTP Plate

1.Fast and Efficient Workflow
Eliminates the need for film output and traditional exposure. CTP streamlines the process from computer to plate, reducing lead times — ideal for time-sensitive applications like short-run commercial or newspaper printing.

2.Superior Image Reproduction Accuracy
Digital plate-making avoids issues like dot gain and image distortion common in film-based workflows, ensuring crisp images and well-defined tonal gradation.

3.Excellent Ink-Water Balance
Special coating formulation ensures the plate achieves ink-water balance quickly, reducing waste and improving press productivity.

4.High Durability
Supports print runs of up to 500,000 impressions per plate (depending on press conditions), minimizing replacement frequency and reducing costs.

5.Cost-Effective
Compared to other CTP systems, UV-CTP technology involves lower equipment investment and more affordable plate pricing — a major advantage for cost-conscious printers.

6.Environmentally Friendly
Free from heavy metals in the coating, compliant with international environmental standards, and in line with the global shift toward sustainable printing.

4. Main Applications

• Thanks to its reliable performance and cost efficiency, the Blue Positive UV-CTP plate is widely adopted in:

• Commercial Printing: Magazines, brochures, posters, flyers, books, and other marketing materials

• Packaging: Cartons, labels, boxes, and other printed packaging formats

• Newspaper Printing: Fast turnaround makes it ideal for high-speed publishing

• Publication Printing: Mass production of books, periodicals, and educational materials

5. Why Choose Us?

1.Direct Factory Supply: In-house manufacturing ensures transparent pricing and on-time delivery

2.Free Sampling: Trial orders available to test compatibility and performance

3.Expert Support: Dedicated technical team provides guidance throughout the plate-making and developing process

4.Global Export: Products are exported to Europe, Southeast Asia, the Middle East, and beyond — trusted quality with worldwide recognition