... : 1. Basic violet 5BN and can be used for dyeing silk, cotton, hemp, acrylic fibers, but the fastness is poor, so ... , ink, color pencil, also can be used for dyeing leather, paper, grass products, is Long Danzi pharmaceutical industry (gentian violet) is ... so on, can also be used for dyeing cotton, acrylic, silk, paper, leather, grass products, but also can manufacture Lake 3. Used ...