Yarns - the key material to knitting

It is fair to say that YARN is a key material not just for knitting but for all kinds of textile.
So I feel it is crucial to share some basic knowledge of yarn
Yarn is a long continuous length of interlocked fibres, suitable for use in the production of textiles, sewing, crocheting, knitting, or weaving. Thread is a type of yarn intended for sewing by hand or machine.
  • Yarn types
    • Animal fibre based yarns – these are sourced animals’ hair for instance Cashmere, Angora, Alpaca, Mohair, Merino Wool and Silk.
    • Plant fibre based yarns – these are originated from natural plants for instance Cotton, Bamboo, and also other recently invented Pine Apple, Water Hyacinth
    • Synthetic (artificial) yarns – are basically manmade yarns for instance Acrylic, Rayon, Polyamide and Polyester
  • Yarn compositions – is the percentage used of each different yarn types for one garment (need to add up to 100%). For instance, 55%Mohair 35%Polyamide 10%Spandex
  • Yarn count (or yarn number) - is basically the size of the yarn thread. It is in form of a fraction. The first number is the number of plies. The second number is based on the length of yarn needed to make up a specified weight, the larger the number, the finer the yarn. For instance, 3/10 or 2/20. 
  • Yarn ends – number of yarns used to knit together