NovaSolTM SP 34
Product Description & Application
A premium single pot emulsion for commercial graphics printing.
Blue pure photopolymer emulsion
Resistant to UV-cured, plastisol and solvent-based ink. Water resistant when post-exposed
Medium solids content and medium viscosity for excellent print definition on any mesh
Exposes 4 times faster than diazo or dual-cure emulsions with no mixing required
Solid content 34%
Easy to reclaim
Directions for use
Handle under yellow safelight or low wattage tungsten lights. Avoid exposure to daylight, quartz/halogen lamps, cool white fluorescent lamps or discharge lamps.
Sensitizing & Mixing
Emulsion is presensitized during production and does not require mixing
Mesh Preparation & Degreasing
Degrease and abrade new mesh with Degreaser in order to optimize stencil adhesion; dry and store the screen in a dust free, dry environment prior to coating. For more applications, thoroughly degrease the mesh prior to use with NovaSol Degreaser.
Using a high quality scoop coater or coating through, apply one or two coats to the substrate side of the screen, followed by one or two coats on the squeegee side. For a thicker stencil, apply additional coats to the squeegee side prior to drying. For a higher quality stencil with a minimal increase in stencil thickness, apply one or two additional coats to the substrate side of the screen after the initial coats have dried.
Drying & Storage
Thoroughly dry the coated screen at a maximum temperature of 104oF (40oC) in a dust free, dark or yellow light area, with the substrate side facing down to optimize stencil quality. Coated Screens should be stored in a dust free, dry, safelight environment.
Ensure that all surfaces, emulsion, film and glass are free of dust to minimize pinholes. Contact the emulsion side of the positive with the substrate side of the screen and secure in position before placing the screen in a suitable vacuum frame. Many variables, such as lamp type and age, distance from lamp to screen, mesh type and coating thickness, can affect exposure time. Perform an exposure test with an exposure calculator to determinate correct exposure time for a complete cure.
Wet both sides of the screen with a strong, finely divided spray of water and continue washing out until all image areas are fully open. Rinse both sides of the screen and dry thoroughly before use. A properly exposed and developed screen will not leave residues on the squeegee side. Post expose with daylight or exposure lamp to produce a more water-resistance stencil.
Remove all ink residues immediately after printing with an appropriate solvent. Remove stencil with NovaSol Decoater Gel or Powder with a pressure wash. For stains and ghost images, use NovaSol Haze Remover followed by a pressure washer.
Health & Safety
Before using, refer to appropriate material safety data sheets.
Problem Solving
Poor Coating Quality
Clean, degrease and rinse the screen mesh to remove all residues and traces of chemicals
Check the tension of the screen on the frame
Clean and ensure the scoop coater does not have any defect edge
Poor Detail or Difficulty Washing Out Image
Ensure emulsion and coated screens are handled in safe light conditions only
Ensure a minimum vacuum of 0.66 bar (500 mm Hg or 20 in Hg) on vacuum gauge for optimum contact of the positive
Optimize exposure time and use only high quality film positives
Do not store sensitized emulsion or coated screen at high temperatures
Emulsion Falls Off, Extreme Pinholes or Severe Stencil Breakdown during Printing
Ensure that damp screens are not being exposed
Only expose screens with an even and consistent Coating thickness
Ensure that stencil has not been severely underexposed
High temperature
Difficulty Reclaiming Screens
Not reclaimable once catalyzed
Optimize exposure time and properly rinse the squeegee side of the screen during developing to remove all residual traces, especially when using higher mesh count dyed fabric
When sealed in the original container and stored in cool conditions, NovaSol products will maintain their original properties for one year from the date of production.
"Read and understand the Material Safety Data Sheet prior to the usage of the product".