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What is RSpec?

RSpec is the peak reflectance measured over a very narrow angular band in the specular direction (+/-) 0.0991º.

RSpec is very sensitive to any texture that is present on a surface. This texture or waviness acts as a concave or convex reflector that deflects light around the specular angle. When RSpec is equal to the gloss value the surface is smooth, as texture increases the RSpec value decreases.

The diagram above shows the same coating applied to two panels, the first has orange peel/waviness present due to the incorrect application setting on the spray gun.

Related products

Flow cup afnor

AFNOR Viscosity Flow Cup

  • 2mm - 8mm orifice diameter
  • 15 – 3000 cSt viscosity range
  • 25 -150 sec flow times
  • Supplied with a certificate of conformity
  • Sheen 419/2.5, 419/4, 419/6 & 419/8 equivalent

Flow cup astm iso

ASTM D1200 Viscosity Flow Cup

  • 2.1mm - 5.8mm orifice diameter
  • 10 – 1200 cSt viscosity range
  • 30-100 sec flow times
  • Supplied with a certificate of conformity
  • Sheen 406/1, 406/2, 406/3, 406/4 & 406/5 equivalent

Flow cup bs3900

BS3900 (1971) Viscosity Flow Cup

  • 2.38mm - 7.14mm orifice diameter
  • 38 – 1650 cSt viscosity range
  • Flow times 300-300 sec
  • Supplied with a certificate of conformity
  • Sheen 401/2, 401/3, 401/4, 401/5 & 401/6 equivalent