Orco Synthrowite NL™

Orco Synthrowite NL™ is a high-substantivity optical brightener for cotton for use in continuous-pad, pad-bleach and hydrogen peroxide bleaching baths at high temperatures of 200 – 212°F(93-100°C).


Physical Properties

Chemical Type Stilbene
Shade of NL Neutral to slightly blue cast
Appearance Amber pourable fluid
Ionic Charge Anionic
Stability Stable to strong alkali and hydrogen peroxide; unstable to acids
pH 8.5 – 9.0
Lightfastness Good
Washfastness Very good




  • 0.25 to 0.5% owg Orco Synthrowite NL™

Continuous Pad

  • 0.25 to 0.50% owb Orco Synthrowite NL™
  • 0.10 to 0.25% owb Orconol CHSA Conc™

Pad at 100-120°F(38-49°C).

Dry and develop at 300-325° F(150-162°C) for 90 seconds.

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