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KEY-880 High-Precision Steel Wire Mesh Photo Emulsion

KEY-880 High-Precision Steel Wire Mesh Photo Emulsion

Product Highlights

RoHS PASS	High resolution, fine lines	High sensitivity, short exposure time
Excellent peelability; the screen printing plate is recyclable.	It has excellent preservation stability.	Good leveling properties and fast development speed

Product Description?

KEY-880 high-precision steel wire mesh photo emulsion is a diazo, solvent-resistant, water-resistant, and photosensitive resin-type photosensitive emulsion. It is suitable for printing conductive silver paste and sintered pastes on solar cell front/back/back aluminum panels, resistive/capacitive touchscreens, MLCCs, ceramic substrates, and electronic components. The printed graphics are smooth, clear, and full. Specifically designed for high-precision steel wire mesh printing, it is particularly suitable for stainless steel wire meshes of 400 mesh or higher, with an L/S ratio of 30-50μm.?

Product Features

Appearance	Specification	Emulsion weight	Solid content	Viscosity (mPa·s) Type B viscometer, 25℃	Diazo
Blue sticky emulsion	1 kg	900 g	33%	8000	KEY-880D

Features

Compliant with EU RoHS Directive 2.0 standards.
It meets the EU 16P certification standard.
High-precision steel wire mesh photosensitive emulsion has excellent acid resistance, solvent resistance, water resistance, and high printing durability.
High sensitivity, short exposure time.
Suitable for automatic coating of stainless steel mesh.
It has ultra-high resolution and can produce high-precision screens with an L/S ratio of 30-50um. It has good printability and is easy to make fine lines.
It has extremely strong adhesion to stainless steel wire mesh, high printing precision, and is non-deformable and does not stick to the printing plate.?

Exposure time

Screen type	Angle	Film thickness	Light source	Lamp distance	Optimal exposure time
SUS 500/16	22.5°	10±1μm	Ultra-high pressure mercury lamp ?3KW	1m	82 s

How to use

Sensitization: Dissolve diazonium salt 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 screen from the previous pass is completely dry before proceeding to the next pass to prevent film peeling.

Drying: Optimal drying temperature is below 40°C. Excessive heat may cause thermal reactions in the photosensitive emulsion, compromising plate-making quality. Ensure screens are thoroughly dried.

Exposure: Optimal wavelength is 300-400nm. Results are enhanced using ultra-high-pressure mercury lamps or high-pressure gallium-iodine lamps.

Development: Use a high-pressure water gun or spray gun to flush the plate surface at a constant speed.

Drying: After development, first remove surface moisture from the screen before placing it in a drying oven below 40°C. Ensure thorough drying; otherwise, the screen may lose emulsion.

Secondary Exposure: Expose the S-side. The exposure time should be 1-2 times that of the P-side exposure, significantly improving print durability.