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KEY-Sliver 5# Photo Emulsion

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.