High Sharpness Laser Photo Emulsion For Rotary Printing Screens In
Chemical
Photo Emulsion Specifications:
Milky white emulsion for laser stencil making.
High sharpness of separation, convenient process and fine accuracy.
Suitable for squeegee or magnetic rotary screen printing machine.
photo emulsion for rotary screen
milky white
good drability of printing
suitable for rotary printing screen and squeegee
Photo Emulsion Application:
1.Washing the screen:
Immerse the screen into Cleaning liquor for nickel screen for
around 10 minutes, take out and rinse with water, then dried at low
temperature in an oven. At the same time, prevent the screen from
being stained with dirt(It is necessary to wear protective gloves
avoiding corrosiveness).
2.Preparing the photosensitive emulsion:
It should be operated under a gentle yellow light(prohibit from
operating in no opacifying condition).35-50ml of photosensitizer
solution is added into 1000g of photoemulsion, stir clockwise until
to homogenous, stand for 1-2 hours to let off bubbles in a cool and
dark place. Then maintain the prepared photoemulsion at 5-15℃ in a
constant temperature storage box (a seal cover is needed to avoid
skinning).
3.Coating:
300g of the prepared emulsion is added into a clean scraper ring and
coated on the clean screen with a speed of 10-12cm/min, then dried
at 35-40℃ and 60% relative humidity in an oven with circle wind and
no more than ±2℃ temperature differences.
4. Exposure:
Fixed the coated screen on an exposure machine and fit the
manuscript closely
The fit time should be determined after trial. Reference time: 5-8
times on a scanning machine or 1-3 minutes on a stationary exposure
machine.
5. Developement:
The exposed screen should develop timely by putting it in water at
5-30 for approx. 3-5 minutes, then washed until patterns appear
clearly, then rinse off the leaked emulsion with water under low
pressure, and dried at 50-60 in a constant temperature oven.
6. Curing:
Curing the retouched screen at 180 for 2 hours in a constant
temprature oven until the film becomes golden, then take out to
bind with endring after cooling down.
Laser engraving:
Make the stencil by laser generator after color separation by
computer in according with patterns.
Package:
5kg per plastic barrel, and 20kg per export carton.
Storage:
One year at 5-35℃(in a dark and dry place).
