Ascent Dye Chem offers Reactive Navy Blue Herd Dye. Ascent Dye Chem manufactures different types of Reactive Dyes. The Reactive Navy Blue Herd Dye or Reactive Blue 171 is used to color wool and nylon, which are applied under suitable conditions. The Reactive Navy Blue Herd Dye is used in commercial and domestic sectors. These are available in powdered forms and are packed in quality packaging materail of varied capacities. The features of the Reactive Navy Blue Herd Dye are high density, resistance to temperature fluctuations, free from impurities and high viscosity.