Re: TWIST Tablet weaving with handspun.

[Gudrun Polak]

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Sponsored by TWIST - Tablet Weavers International Studies & Techniques

Hi Peter,

thank you for this analysis of what goes on when we turn our cards. I 
enjoyed reading page 79. The twist increase and esp. the twist decrease 
should be an important consideration for everybody who card weaves with 
singles.

My first example (one card with S-spun yarn, the next card with Z-spun 
yarn) does not really just apply to handspun yarn because you can get 
the effect by using identical yarn in all cards and turning some of them 
forward and some backwards. I have made a small bag where those kind of 
stripes are the major design element.

I still like to see what you get when you use two S-spun threads and two 
Z-spun threads in every card. We may have to wait for Denyse's pictures 
or I find two yarns that only differ in the spinning direction.

Reading page 79 lead me to some new questions which I will post in 
separate messages with the subject lines of "Ridges" and "Corkscrew".
Gudrun


peter collingwood wrote:
Gudrun.  You could take 4 S-plied threads and 4 Z-plied threads and
twist them both in the same direction,  making two 4 strand cords. I
think this will show the difference between a "twist-on-twist" cord
(bumpy irregular surface) and the more normal "twist-against-twist" cord
(smoother surface). Former will try and untwist much more than latter,
which tends to be more balanced. So this is the visual difference you
would get if using this idea as stripes in a TW band.

I know that  page 79  in my TTW looks very dull (no pictures or diagrams
!) but it was the result of much experiment in this field. There is, for
example, an unexpected  effect that a turning tablet has on the actual
twist in the threads it holds. This means that a warp thread on near
side and on far side of the tablet pack can acquire a (sometimes quite
visible) difference of twist. 

I suppose looking at any pre-1800 TW in a museum collection would give
an idea about the type of hand-spinning originally  used for warp yarn. 

Peter Collingwood
  

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