Drafting and Denting Plan in Weaving Design

Systems of drafting

Apart from straight draft there are other systems of drafting which are in vogue. Some of the common ones are given as follows:

1. Skip drafts

This systems is particularly useful is weaving very densely set fabrics. Normally a small number of heald shafts is required, but to avoid overcrowding of heald eyes and to reduce friction and rubbing, more than minimum heald shafts are used.

For example, the plain weaves indicated at A may be drawn on two heald shafts as shown in B. But this works only when cloth is coarse. If the cloth is of medium fineness then plain weave may be drawn on four heald shafts as shown in C. If the cloth in very fine, the plain weave may be drawn on six heald shafts, as indicated in D.

Sateen draft

The purpose of sateen draft is similar to skip draft. It is also used to reduce friction between adjacent warp ends and to prevent overcrowding of heald eyes. But here the number of heald shaft is not increased rather the ends are staggered and placed randomly.

For example the following design employs straight draft.

However, the same design can be made using sateen draft

Notice that peg-plan is also changed.

Point draft

Point drafts are used for weaves which are symmetrical about the centre. They are frequently employed to produce waved or diamond effects.

The main advantage of the system is that is allows the production of a large number of effects with lesser number of heald shafts than those used in straight draft.

Example – Consider a design employing pointed draft as in this figure given below:

Denting plans

Denting plans describe the arrangement of the warp ends in the reed (dents are the gaps between the metal reed wires).

Denting plans depend on the number of ends per inch and the number of dents per inch in the reed.

Denting plans indicate how many inch to be put in one end of the dent.

It we place those ends which work alike in the same dent of the reed, there will be same rubbing of ends.

The prevent this, the ends which work alike are drawn through different dents.For Example, The figures A show a design and B its denting order.