KEY-PLUS S/3 Photo Emulsion

Performance Features

Product Application Scope

A solvent-resistant diazo UV polymer photosensitive emulsion for producing high-quality film plates. Its exceptional resolution makes it ideal for four-color halftone printing, fine text, and fine line reproduction. With outstanding resolution and superior bridging capability, it excels in four-color halftone printing, fine text, and graphics (circuit boards, ceramic printing, scale plates, etc.). Its good water resistance also makes it suitable for limited runs with water-based inks.

Reference Exposure Time

It is recommended to perform a secondary exposure after development, which can effectively improve print durability and enhance peelability.

Instructions for Use

Sensitization: Dissolve diazonium in approximately 70–100 grams of purified water. Then pour the diazonium solution into the photosensitive emulsion and stir thoroughly with a glass rod or wooden stick. Allow the solution to stand until all bubbles have completely disappeared 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 triggers 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 iodide lamps.

Development: Uniformly flush the plate surface using a high-pressure water gun or spray gun.

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 experience 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.

Packaging Specifications

900 kg/can（12can/box）

Storage and Transportation

Transport using clean trucks. Stack individual packages no higher than five layers, with the bottom layer secured using anti-slip pallets to prevent crushing, deformation, or tipping.

Ensure proper sealing, avoid direct sunlight, and keep away from high heat.

Unopened and unsensitized, the shelf life is 12 months.