Know-how:

 

Tips for top surfaces

Not only high-quality products are required for a perfect surface coating. Professional
processing is equally as important: Everything from a flawless base to the correct spray system, right up to appropriate application onto the wooden element.

Our recommendations for professional processing:

 

Nozzle selection for paint and varnish

  • Size: 0.28 mm (0.011 inch) or 0.33 mm (0.013 inch); spray angle: 20° for frames and leaf parts, 40°-50° for doors and flat wood structures
  • The service life of a spray nozzle depends on the material being sprayed and the spray pressure (which must be checked regularly)
  • The spray nozzle should never be cleaned with sharp-edged objects (e. g. knife, screwdriver, etc)
  • Material filters on the spray pistol and the pump must be inspected regularly and replaced as necessary
  • Shorter drying periods can be attained with a multiple coat system

 

Pump adjustment

  • Material pressure: Opaque + translucent products 80-100 bar
    Double membrane pump
    The setting can be read from the pressure gauge
    Reciprocating pump
    Material pressure depends on the transmission ratio (consult the spray equipment manufacturer)
  • Atomiser pressure for double membrane and reciprocating pumps Opaque + varnish 0.5 to about 1.2 bar (Esta system, max. 1.5 bar)
  • Only the absolute minimum of atomiser air, as necessary, should be used. This can be pre-tested on the basis of spray tests on cardboard (streak-free, homogeneous, atomised spray pattern).

For automatic spray processes (e.g. Esta system)

  • Processing in a 1-coat system (up to 350 μm wet)
  • Machine coating guarantees even material application and thus flawless surfaces

 

For manual spray processes

  • Processing in a 2-coat system (2 × 150–200 μm wet)
  • Avoids defect locations in the coating surface
  • Certain coat thickness even in problem areas
  • Smooth, evenly spread surfaces