That was such an informative project that this past couple of weeks I've been designing and weaving a twill structure gamp. It follows the same principle as the color gamp, only this one explores many varieties of twill structure, specifically the way various twill threadings interact with various treadlings. Color changes are limited to those that allow the weaver to see easily where the different threadings and treadlings start and stop. So the warp is all one color (here, white 10/2 Tencel because I had plenty of it), with narrow green 8/2 Tencel stripes between each different threading structure in the warp. The weft is taupe 8/2 Tencel, again with green stripes dividing each section of different treadling.
|loom warped with twill gamp in white with green dividing stripes|
Because my counterbalance loom does not easily make a shed for 1/3 or 3/1 twills, nearly all the patterns I tested were variations on 2/2 twills. Still, I was able to do 38 different treadlings. I discovered that in order to try the maximum number of treadlings, I needed to use a skeleton or universal tie-up, with each treadle tied to only one shaft. Thus, I'd need to use both feet to make each shed. I was a little unsure about this but I soon got used to it.
|Twill structure gamp in progress|
|Twill gamp folded and labelled for study|