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KEY-Sliver 5# Photo Emulsion
Product Highlights
RoHS PASS | Excellent water and solvent resistance | High sensitivity, exposure time |
High resolution, fine lines | High solids content and good leveling properties | The film is soft and prevents ink bleeding. |
Scope of application
Suitable for high-precision electronic products such as PCBs, FPCs, mobile phone cover plates, and solar cell back electrodes/back aluminum, as well as fine line and dot screen printing.。
Product Features
Appearance | Packaging specifications | Emulsion weight | Solid content | Viscosity Type B viscometer, 25℃ | Diazo |
Blue sticky emulsion | 1 kg | 900g | 45% | 8800 mPa·s | K5-3.0g |
Exposure time
Screen type | Angle | Film thickness | Light source | Lamp distance | Optimal exposure time |
250T(Y) | 22.5° | 15±1µm | Ultra-high pressure mercury lamp 3 kW | 1m | 2.5 min |
How to use
- Sensitization: Dissolve diazonium in approximately 70-100 grams of purified water. Pour the diazonium solution into the photosensitive emulsion and stir thoroughly with a glass rod or wooden stick. Allow bubbles to dissipate completely before use.
- Coating: Apply using a high-quality squeegee. Coating characteristics depend on screen size and tension. Determine the number of coating passes required to achieve the desired film thickness based on printing needs. For two or more coating passes, ensure the previous screen is completely dry before proceeding. Failure to do so may cause film peeling.
- Drying: Optimal drying temperature is below 40°C. Excessive heat may cause thermal reactions in the photosensitive emulsion, affecting plate-making results. Ensure screens are thoroughly dried.
- Exposure: Optimal wavelength is 300-400nm. Results are enhanced using ultra-high-pressure mercury lamps or high-pressure gallium iodide lamps.
- Development: Use a high-pressure water gun or spray gun to flush the plate surface at a constant speed.
- Drying: After development, remove surface moisture from the screen before placing it in a drying oven below 40°C. Ensure thorough drying to prevent emulsion loss.
- Secondary Exposure: Expose the S-side for 1-2 times the duration of the P-side exposure to significantly enhance print durability.
- Curing: After complete drying, evenly apply the mixed A+B curing solution to both P-side and S-side. After 1-2 minutes, use an air gun to blow through the ink-flow area. Dry for 20-30 minutes to substantially improve screen print durability.
Transportation and storage
Transport in clean trucks. Single packages should not be stacked more than five layers high. The bottom layer should be secured with anti-slip pallets to prevent squeezing, deformation or tipping.
Keep sealed, avoid direct sunlight and high heat.
Unopened and unsensitized, the product has a 12-month shelf life.
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