Ideal yarn would contain all of the following properties:
• The Yarn’s circular and cross-section should be in uniform along its length.
• The Yarn must be composed of concentric layers of different radial.
• Each fibre must follow a uniform helical path around one of the concentric cylinders so that the distance from yarn’s axis remains constant.
• Each fibre at the centre will follow a straight line with the axis.
• The axis of the circular cylinders’ coin sides should be paralleled.
• The number of filaments or fibres crossing the unit area must be consistent.
• Every filament in the yarn must the same amount of twist per unit length.
• The yarn should consist of a very large number of filaments.
If one of the above mentioned yarn properties is absent on any yarn, then the yarn should not be used for the weaving of fabric.