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KEY-PLUS 200B Diazo Water-Resistant Emulsion
Product Highlights?
Comply with Rohs Environmental Directive | High Resolution, Fine Lines | High Photosensitivity, Short Exposure Time |
Good Film Stripping Performance, The Screen Can Be Recycled | Excellent Storage Stability | Good Leveling and Fast Developing Speed |
Product Description?
KEY-PLUS 200B is a diazo-water-resistant photosensitive emulsion.
Suitable for various water-based slurries and water-based inks for clothing printing, semi-automatic and fully automatic printing.
Product Parameters
| Appearance | Specification | Colloid Weight | Solid Content | Viscosity (mPa. s) B-type viscometer, 25°C | Diazo |
| Blue Viscous Lotion | 1 kg 5kg | 900 g 4500g | 40 % | 8000 | KEY-PLUS 200B 3.0g |
Product Features
- It has excellent water resistance and high printability;
- It has excellent resolution performance and good graphic reproducibility, and can produce fine lines and dot graphics;
- It has excellent coating performance, good leveling, and fast developing speed;
- It can greatly improve the printability when used with KEY-NO.9 A+B hardening liquid;
Exposure Time
| Screen Type | Angle | Film Thickness | Light Source | Light Distance | Best Exposure Time |
| 150S（W） | 22.5° | 15±1μm | Ultra-High Pressure Mercury Lamp 3kw | 1M | 60 S |
Instructions for Use
Sensitization:?Dissolve diazo in about 70-100 grams of pure water. Then pour the diazo solution into the photosensitive glue, stir it thoroughly with a glass rod or a wooden stick, and use it after the bubbles disappear completely.
Coating: Use a high-quality scraper for coating. The characteristics of coating are related to the size and tension of the screen. Confirm the number of coating processes according to the needs of the printed matter to obtain the required film thickness. If more than 2 processes are required for coating, the next process must be carried out after the screen coated in the previous process is completely dry, otherwise it will cause the glue film to fall off.
Drying:?It is best to control the drying temperature below 40℃. Too high a temperature will cause the photosensitive glue to produce a thermal reaction and affect the platemaking effect. The screen should be fully dried.
Exposure:?The best light wave is 300-400nm. If an ultra-high pressure mercury lamp or a high-pressure gallium iodine lamp is used, the effect will be better.
Development: It is recommended to use a high-pressure water gun or a spray gun to rinse the plate at a uniform speed.
Drying:?After development, remove the moisture on the surface of the screen first, and then put it into a drying oven below 40℃ for drying. It needs to be fully dried, otherwise the screen will easily fall off.
Secondary exposure: Expose the S side, and the exposure time is 1-2 times that of the P side, which can greatly improve the printing durability.
Hardening: After the screen is completely dry, evenly apply the mixed KEY-NO.9 A+B hardening liquid on the P and S sides of the screen. After 1-2 minutes, use an air gun to blow through the lower ink area and dry for 20-30 minutes, which can greatly improve the printing durability of the screen.
Please Note
Photosensitive glue storage: Before sensitization, the storage temperature of the photosensitive emulsion colloid is best in a cold and dark place at 20℃. Do not store it in an environment above 25℃ or below 5℃, otherwise it is easy to produce chemical and physical changes, affecting normal use. Please store diazo in a refrigerator at 0-5℃.
Degreasing of the screen: Before applying the photosensitive emulsion, the screen should be thoroughly cleaned with a special degreasing agent to remove grease and dirt. After thorough cleaning and drying, high-quality screens can be obtained and the printing durability can be improved.
Diazo dissolution: Pure water or purified water should be used to dissolve diazo. If tap water is used directly, the minerals and water rust in the tap water will react chemically with the photosensitive emulsion, affecting the performance. In severe cases, the colloid will agglomerate and cannot be used normally.
Drying oven temperature: The temperature of the drying oven is best below 40℃. When it exceeds 40℃, the photosensitive emulsion is prone to thermal reactions, which reduces the resolution. The drying oven should have an exhaust device to discharge moisture in the box and improve the efficiency of complete drying of the screen. Check the temperature inside the oven every month to see if it is consistent with the set temperature. Check the temperature inside the oven every month to see if it is consistent with the set temperature.
Winter development: If the developing water temperature is too low in winter, it will cause poor screen development and reduced resolution. It is recommended to use warm water (25°C) for development.
Packing Specifications
Black thick plastic can: 1kg/can, 5kg/barrel
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