Close-up Colorful Homespun Yarn Ball For Your Hand Craft Projects. Spun Yarn Is Made By Twisting Or Otherwise Bonding Staple Fibers Together To Make A Cohesive Thread. Twisting Fibers Into Yarn In The Process Called Spinning Can Be Dated Back To The Upper Paleolithic, And Yarn Spinning Was One Of The Very First Processes To Be Industrialized. Spun Yarns May Contain A Single Type Of Fiber, Or Be A Blend Of Various Types. Combining Synthetic Fibers (which Have High Strength, Artificial Lustre, And Fire Retardant Qualities) With Natural Fibers (which Have Good Water Absorbance And Skin Comforting Qualities) Is Very Common. The Most Widely Used Blends Are Cotton-polyester And Wool-acrylic Fiber Blends. Blends Of Different Natural Fibers Are Common Too, Especially With More Expensive Fibers Such As Angora And Cashmere. Photo