Grafix DxiT – Diazo Sensitized Emulsion

Characteristics:

• Blue colour diazo emulsion
• Phthalate free
• Excellent print definition on a variety of meshes due to medium solid content and viscosity
• Excellent exposure latitude
• Dual cure emulsion resistant to solvent based and water based inks

Usage Instructions

Handle NovaSol 434 under yellow fluorescent tubes or low wattage Tungsten light. NovaSol 434 is supplied as a two-pack kit comprising the Emulsion and Sensitiser Powder in separate bottles. Prior to using the Sensitiser, Material Safety Data Sheet should be carefully read and understood.

 
• Preparation of Sensitiser
Add luke warm water 8 to 10 times directly to the Sensitiser Powder and shake well to ensure complete solubility of the powder. The prepared Sensitiser should be mixed with the emulsion immediately. Do not store Sensitiser mixed with water.

• Preparation of Coating emulsion
Pour the Sensitiser dissolved in water into the emulsion. Stir thoroughly for approximately 2-3 minutes to ensure emulsion is sensitised uniformly. Allow the emulsion to de-gas for 1 hour so that the air bubbles are disappeared.

• Mesh Preparation
Thoroughly degrease the screen prior to application of the coating. Used / reclaimed screens will have to be cleaned and degreased carefully to ensure removal of all oily residues. Cleaned screens should be dried with a hot air blower prior to application of the emulsion. Novasol 434 is best suited for polyester, nylon or silk screens.

• Coating & Drying
Stand the screen on edge, angled away from the operator and, using a good quality coating-through, proceed as follows : Apply 2 coats to the squeegee side and 2 coats on the underside of the screen. Additional application of coating as required may be done on the underside of the screen with intermediate drying. The screen should be dried horizontally, squeegee side up and stored under dark or yellow light conditions. Dry the screen at a maximum temperature of 30° C (86° F).

• Exposure
Achieving correct exposure is essential for optimum stencil performance. Under exposure will result in weak stencil with reduced resistance. Remove dust from the surface of the stencil and tape the positive in position. Place entire screen in a suitable vacuum frame and expose. Test exposures using Exposure Calculator is recommended to ascertain correct exposure timing.

• Washout and Drying
After exposure, washout both sides of the screen under high-pressure spray of water. Continue the washout until all parts of the image appear clean and sharp. Blot off surplus moisture with lint free blotting medium and dry at a maximum temperature of 30° C (86° F)