Hellas-E UV Exposure Unit with Vacuum

Hellas-E is a single-sided UV exposure unit with a vacuum frame designed for processing photosensitive materials sensitive to near-UV radiation in the 360 to 400 nm range. Thanks to its large work surface, it is particularly suitable for applications where the A4 format of standard desktop exposure units is no longer sufficient.

In glass manufacturing, the Hellas-E can be used primarily for the production of UV sandblasting stencils. The unit can also be used for other photosensitive materials operating within the corresponding spectral range.

Vacuum frame for tight contact between the UV film and the master

The integrated vacuum pump creates a vacuum of approximately 0.8 bar within a few seconds. The vacuum frame presses the exposure master against the photosensitive material and helps ensure uniform contact across the entire surface.

Proper positioning of the original is particularly important for minimizing unwanted backlighting along the edges of the image and ensuring the accurate reproduction of fine details. The current vacuum level can be monitored using the pressure gauge on the front of the device.

Digital timer for precise exposure settings

The exposure time is set using a digital timer with an LCD display. The time can be set within a range of 1 second to 9 minutes and 59 seconds.

Control is via the MODE, +, and – buttons. Once started, the timer continuously displays the remaining exposure time. The exposure can be paused during the process and then resumed with the remaining time. Once the set cycle is complete, the UV lamps automatically turn off and the device alerts the operator with an audible signal.

Key Benefits

• Large 570 × 300 mm exposure area
• Vacuum system for precise contact between the original and the photosensitive material
• Vacuum pressure of approximately 0.8 bar
• Single-sided UV exposure
• Operating spectral range: 360 to 400 nm
• Digitally adjustable exposure time
• Timer from 1 second to 9 minutes 59 seconds
• LCD display showing remaining time
• Automatic exposure shutdown upon cycle completion
• Audible signal when exposure is complete
• Suitable for producing UV sandblasting stencils
• Compatible with a range of photosensitive UV films
• Integrated vacuum gauge for vacuum monitoring

Technical Specifications

Use of the Exposure Unit

Place the photosensitive material together with the exposure template on the black work plate. It is important to ensure that no dirt or dust remains between the template and the photosensitive material, as this could affect the quality of the final exposure.

Once the original is properly positioned, lower the vacuum frame and turn on the vacuum pump. Within a few seconds, a vacuum of approximately 0.8 bar is created, which can be checked on the pressure gauge. Then, close the top cover, set the desired exposure time, and start the UV exposure.

The vacuum must remain on throughout the entire exposure. Once the exposure is complete, open the cover, turn off the vacuum pump, and only then raise the vacuum frame.

Safety and Maintenance

The exposure unit must be used with the cover closed during UV exposure. The device must be disconnected from the power supply during maintenance or when replacing UV lamps.

To ensure proper functioning of the vacuum system, it is important to keep the vacuum film clean and undamaged. We recommend cleaning it with a mild detergent or glass cleaner and a lint-free cloth.