A fishing line consists of twisted threads or fibers, which in general are attached to the float, hook and sinker. Different types of fishing lines come with special features among which are monofilament and multifilament lines. These lines are distinguished mainly by type of material utilized along with weight and length of its fibers. This line is measured in diameters and is requires exhibit good resistance to ultraviolet rays, stretching ability and visibility.
Monofilament Fishing Lines are made using single fiber or even plastic. These have been utilized for long and are among the oldest kind. They are essentially made of nylon, which at times gets mixed with different materials known as copolymers, which helps improve its user qualities. Monofilament lines are highly popular, majority of which are cheaper than other varieties. Consistency of color and strength are among the qualities to expect with them. Normally, this kind of line is transparent or somewhat translucent, having tinges of variable colors. Line color gets controlled by addition of chemicals and the monofilament variety bears the advantage of being stretchable while under load. It is employed for diverse fishing applications, but may not be utilized under deep water since the line absorbs more amounts of water, thereby occasioning loss of knots. However, the monofilament line fishing has been known to cause death of birds, fishes and other animals, which are invisible underwater, thus posing an environmental risk.
Multifilament fishing lines are constructed using diverse types of fibers, with silk and cotton being used in the early days. Today however, polyester or polymers are the more common fibers used. This kind of line is quite thin, but exhibits formidable strength and is costlier than its monofilament equivalents, though stretchable to less extent in comparison. As such, they function most effectively on bait casting reels and may be utilized under deep water. Multifilament lines for fishing consist of unbraided fibers, which are instead cabled, twisted or stuck together.