Bluecoat - 090 Photo Screen Emulsion
(Sharper Image & Eco Friendly Diazo Sensitizer Based )
(No Ammonium Bichromate Sensitizer)
Under the Direct Emulsion Technique of stencil preparation Bluecoat is coated into the screens and within no time screen is ready for printing and this replaces the traditional time consuming and irritating methods of preparing the screens. Our Bluecoat PHOTO EMULSION which is one the textile adhesive manufactured under standard conditions and under strict quality control.
Proper fabric treatment and adequate degreasing are very important for good result. Therefore, wash the screen with clean water and dry it.
Take 1 kg of Bluecoat emulsion in a clean vessel. Also take 50mL distilled water to mix 4 grams of Diazo Sensitizer and stir the solution till it is completely dissolved. Mix this solution of Diazo Sensitizer with the Bluecoat solution of 1 kg. and stir until the colour of the solution is changed to light uniform green. Viscosity of the emulsion can be adjusted with distilled water Filter the emulsion with bolting cloth and close the container at least for 1/2 hour so that all the air-bubbles are disappeared.
It is always desirable that light in the Photography department is subdued light and if possible, yellow light.
Direct emulsion coating requires skill to produce uniform pinhole free stencils. Important factors are the fabric mesh number, thread diameter, colour of the fabric the tension and the solid contents, the thickness of the coating blade, angle and speed of the coating blade across the screens etc. If you change the supplier of the bolting cloth, check and see that you are receiving the same type of material as before. Thus it is very important that print quality is dependent upon the correct coating technique. If the coating is made to the satisfaction then one coating is sufficient from outside otherwise repeat the procedure.
After the coating is over, it is important to thoroughly dry the coated screen before it is exposed otherwise stencil quality will be poor. Moisture remains present in the coated screen even when the screen feels dry to touch if you are coating the screen for second time. It is important that the first coat be thoroughly dry before the second coat is applied. Dry the coated screens in horizontal position at room temperature with fans, to get best result and sharpness.
Exposing is one of the most important factors in achieving fine image and sharpness and maximum mechanical screen resistance. The only way of achieving the correct exposing is through adjusting exposing time using fixed factors such as no of tubelight, the quality of the light, set distance and set coating techniques and accordingly photography time is adjusted. Time of photography varies between 30 seconds to 120 seconds under standard conditions.
Immediately after the exposure of screen wash the screen. With gentle spray of water from the squeeze side i.e. inside until the image comes up if required use rubber foam gently.
The most common method is to use the excess emulsion for filling the entire screen with a piece of cardboard it touching is required use the same material.
After the screen is washed out. dry the screen and apply Brasso Hardener with sponge. Before sending it to printing department, wash the screen with a sprayer to remove the excess Brasso Hardener. Your screen is ready for printing.
Considerable time is saved in preparing one complete screen with Bluecoat photo emulsion. The screen is ready to use within 30 to 45 minutes depending upon the repeat and urgency which otherwise take on day with lacquer.
With the use of BC-090, the printed screen remains for long time and it gives pinhole free printing quality.
Printing programme is not disturbed if screen is torn out on the table or machine. With Bluecoat emulsion, Screens can be prepared immediately.
Sharpness of the design is the hallmark of the Bluecoat photo emulsion and sharpness of the design improves to a great extent. Design exposed with BC-090 gives excellent sharpness and product is suitable for half-tone designs.
Cleanliness in the photography department and avoidance of bad smell is possible with the use of Bluecoat photo emulsion.
Keep the container closed & away from sunlight.
12 months, if container is properly closed.
10 Kgs Bucket Packing
We recommend that before using our product in full scale production, the customer should make his own tests to determine the suitability of the product for his own purpose under his own operating conditions. Since the circumstances under which our product is stored, handled & used, are beyond our control, we cannot assume any responsibility of their use by the customer.