4. Beaming, or winding a warp in an even sheet of threads on to a weaver’s beam for the loom.
5. Twisting-in or else drawing-in warp-ends in the loom.
If the threads of a new warp are similar in number and counts to those of the finished warp, and are to pass through the shedding harness and reed also in a similar manner, it is more economical to twist the threads of a new warp separately to the corresponding threads of the old warp, and then draw the twisted portion of the warp bodily forward through the healds and reed. If, however, the number of threads and counts are greatly dissimilar, or if a different drafting is required, then recourse must be had to drawing new warp-ends through the harness and reed.
Warps of one colour may be prepared from either (1) warp-dyed and sized yarn, or (2) from hank-dyed and sized yarn.
The series of operations in this system are identical with those involved in the preparation of grey warps by means of ball warping, but with the additional process of dyeing immediately following the operation of warping, and are as follows:--
A system by which warps of one colour may be prepared by means of sectional warping, from ball-dyed and sized yarn, has been recently introduced. It comprises the following operations, namely--
1. Winding yarn from cops or ring bobbins on to warpers’ bobbins.
4. Winding yarn from ball warps on to warpers’ bobbins by means of a warp-winding machine.
This system involves the following operations, namely--
1. Reeling yarn from cops or ring bobbins into single or multiple hanks. (A standard hank contains 840 yards.)
3. Winding yarn from hanks on to warpers’ bobbins by means of a drum-winding machine.
5. Beaming, or winding yarn from back beams on to a weaver’s beam.
Sectional warping may be substituted in lieu of beam warping.
Striped warps are usually prepared by one or other of two systems, namely, (1) Yorkshire dressing, from warp-dyed and sized yarn; and (2) sectional warping, from hank-dyed and sized yarn. Warp-dyeing yields a more uniform tone of colour than hank-dyeing, for which reason some manufacturers prefer to adopt the former system, although the latter system is less costly.
This system comprises the following operations, namely--