Optical brigheners by RUDOLF GROUP

®RUCO-BLANC - to a brilliant white on your textiles

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01/2017 - 2017

Optical brighteners for cotton

Optical brighteners for cellulosic fibres are often lightsensitive. This phenomenon concerns brighteners of the classic DAS-type. Light transforms the trans-form of the molecule into the cis-form. This shifts the absorption/emission spectrum of the optical brightener into an area of shorter wave length. The light radiated from the optical brightener is invisible, the white effect negated.

ADVANTAGES OF ®RUCO-BLANC OPTICAL BRIGHTENERS FOR CO:

  • good light fastness
  • very good wash fastness
  • good stability in acid or alkaline liquors
  • stable to peroxide bleach
  • stable to reducing agents
  • stable to hard water
  • highest white effects
  • range of tints
  • good exhaustion
  • good levelling capacity

Optical brighteners for synthetics

On PES fibres mainly derivatives of benzoxazole or benzimidazole are used. With these types the best fastness levels are obtained.

ADVANTAGES OF ®RUCO-BLANC OPTICAL BRIGHTENERS FOR SYNTHETICS

 

  • High light fastness
  • Very good wash fastness
  • Good stability in acid or alkaline liquors
  • Stable to peroxide bleach
  • Universally applicable
  • Highest white effects
  • Range of tints
  • Good levelling capacity
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