Threading drafts vs. profile drafts
Sometimes, every thread is indicated in the threading draft. The illustration shows a thread-by-thread threading draft and the complete drawdown draft that results. Other times groups of threads are indicated according to a design. The actual threads to be threaded aren’t given in the threading draft. They are indicated in words that tell which weave structure is being used. Each weave has its own rules, so only the design is shown because the weaver is expected to understand the weave and its rules. They are called profile drafts. They are for working out designs as opposed to patterns.
Profile drafts
The illustration is a profile draft. The threading draft only shows sections of threads, not individual threads, and the drawdown shows the resulting design of the fabric. The treadling draft is not shown, but would be a profile, as well, and the sequence the blocks are treadled is the same as the threading sequence (often called “tromp as writ”).
The bottom line of the threading draft is called block A, and the next line up is Block B. Succeeding blocks going up away from the bottom of the threading draft will be C, D,E, etc. Read more about blocks in my previous posts.
How to use profile drafts
Let’s say the weave structure you want to weave is “monk’s belt”, where Block A is threaded on shafts 1 and 2, and Block B on shafts 3 and 4. See the illustration.
The threading draft would read: 1,2,1,2,1,2,1,2, etc. for as many threads needed for the width of the block indicated in the profile draft.
In this illustration, the blocks are different widths: the size of the first block is very small—only one repeat—so only 2 threads would be threaded in the first block A section. The illustration shows the actual threading for that draft.
Summary
Substitute the threading for your weave structure into the profile draft. Each structure has its special threading and weave structure. There are books that explain this method thoroughly: Sharon Alderman, Mastering Weave Structures and Madelyn van der Hoogt, The Complete Book of Drafting.