In this process, fabrics stretch across two rollers placed above a stationary bath. In jig dyeing, the fabric is held on rollers at full width rather than in rope form as it is passed through the dye bath. This procedure places some tension on the goods, causing flattening and a loss of fullness. If there is uneven tension on the material, a slight variation in the shade may appear either from the centre of the fabric to the selvedge, or from one end to the other.
Procedure:
Jig dyeing consists of a stationary dye bath with two rollers above the bath. The cloth is carried around the rolls in open width and is rolled back and forth through the dye bath once every 20 min or so and in on rollers the remaining time.
Suitability:
This kind of open width dyeing is preferred for some heat sensitive thermoplastic fibres that might form permanent creases and streaks if handled in rope form. Acetate, rayon and nylon are usually jig dyed.
Merits and demerits:
Merits:
Jig dyeing is less costly than beck dyeing.
Most lining fabrics and many other light weight clothes such as taffeta and surah are usually jig dyed.
The capacity of these machines is about 4,000 pounds.
Demerits:
Jig dyeing cannot be done on the fabrics where a soft, full hand is required and it cannot be used for knitted or stretch fabrics which should not be subjected to tension.
Knitted fabrics and stretch woven fabrics cannot be jig dyed because the tensions exerted by the jig would stretch them out of shape.
Participants