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The article contains sections titled: 1. Introduction 2. Economic Aspects 3. Use of Fiber Preparations 3.1. Use of Fiber Preparations in Primary Spinning 3.2. Use of Antistatic or Lubricating Agents in Secondary Spinning 3.3. Use of Antistatic and Lubricating Agents in Dyeing 4. Physical Properties 5. Chemical Properties 6. Fiber Preparations for Special Applications 7. Additives for Spinning Solutions, Spinning Baths, and Spinning Melts 8. Environmental Aspects 9. Commercial Products