Definition: This is the method of dyeing in which the dye or pigment is added to the spinning solution before the extraction of filaments/fibres through the spinnerets.
The addition of dye or pigment to the spinning solution before it is forced through the spinnerets.
Solution dyeing, also called mass pigmentation and dope dyeing.
This method of dyeing is generally used in the production of manmade fibres so as to save a great deal of money and time.
Most olefin fibres are solution dyed.
Process: The procedure is used for other man made fibres that are difficult to dye and have special requirements for colour fastness.
Solution dyeing is the method of colouring that is actually part of the manufacturing process of manmade fibres. In this method, the colouring agent is added to the liquid spinning solution of manmade fibre before it is extruded from a spinneret.
The liquid spinning solution is sometimes called as fibre dope. Hence the term “dope dyeing”. The colour becomes part of the fibre itself, and is thus permanent.
Merits and Demerits:
Merits:
Solution dyed colours are practically fade proof under all common conditions of use. Their fastness to light is outstanding.
Fabrics made from solution dyed yarns are thus well suited from draperies, automotive fabrics and other applications where long sun light exposure is anticipated.
Almost perfect colour reproduction consistency from dye lot to dye lot can be achieved by solution dyeing.
Demerits:
Solution dyed materials are available in only a limited range of colours.
Economically unfeasible.
Solution dyed yarns are not widely used in fashion apparel fabrics because the range of available colours is too limited to satisfy the great variety of colours needed for the fashion market.
is forced through the spinnerets.
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