Photo Emulsion is used to prepare stencils that are used in printing industry by help of positive films.
Japanese MURAKAMI company has preparedPhotocure WSR Diazo Type high performance photo-emulsion special for market.
Applications and Specifications
► Diazo Base Photo Emulsion suitable for Textile Printing
► Applicable for water base ink and plastisol ink
► Superior image reproduction with good resolution and edge definition
► Realization of flatter coated surface with ease of coating process
► Lesser Sticky Surface (stronger resistance to humidity)
► Viscosity: Approx 22.000 mPa・s (at 25℃)
► Solid Contents: Approx 46%
► Standard Packaging: 5kg set
Resistance
Water & Solvent | Ranking | Solvent | Ranking |
---|---|---|---|
Water | Good | Turpentine Oil | Good |
Toulene | Good | Citrus based chemicals | Good |
Acetone | Fair | Methyl Ethyl Ketone | Fair |
Butylacetate | Fair | Methanol | Not Recommend |
Ethyl Acetate | Fair | Dimethylformamide | Not Recommend |
Coating
1.Clean and degrease the screen mesh to enhance coating results (Recommendation of use Our “MSP Cleanser”).
2.Dissolve the attached Diazo in water well (5~10% dilution against Emulsion amount). Do not use “Hot water”.
3.Pour the dissolved diazo into emulsion and stir throughly.
4.Leave the mixed emulsion overnight or filtrate it with Mesh (100cm/250inch or higher mesh) for the emulsion to de-bubble.
5.Coat the emulsion as slow speed as possible to prevent bubble occurrence etc during coating process.
6.Keep the Coated Screen inside Oven Dryer around 40℃ with air circulation.
Storage and Others
○ It’s ideal that you shall use up the mixed(after sensitized stage) within 2 week.
○ It’s advised you filtrate the emulsion with Mesh etc… whenever you put the photo emulsion back from coating bucket into emulsion bottle.
○ It can help you to remove unwanted particles collected during coating process.
Resistance
Mesh | EOM (μm) | Lamp:3kw Metal / Distance: 100cm (UV:42, Intensity: 12mw/cm2) |
---|---|---|
Polyester 31/71 (W) | 35 | 210~270 sec |
Polyester 59/48 (W) | 10 | 90~105 sec |
Polyester 59/48 (W) | 15 | 95~110 sec |
Polyester 100/40(W) | 15 | 100~130 sec |
* Above are guideline only. It’s recommended that you do a step exposure to obtain your desire timing.