The above photo is in black and white because it shows the difference between American open end spun 8/2 cotton (below) and ring spun 2/8 cotton (above) more clearly.
Those numbers are used, these days, interchangeably although they do actually have meaning beyond the obvious - 2/8 (and 8/2) cotton is spun to the imperial system of yarn numbering where the value for 1 is 840 yards per pound - for cotton. Other fibres have different values for 1.
So what does that mean?
If 1 equals one pound of cotton fibre spun so that it produces approximately (the numbers are only ever approximate) 840 yards of yarn, the other sizes can be calculated from that by beginning with 840.
For 2/8 (or 8/2) cotton, that means that the spinner or spinning mill has spun 8 times 840 yards of yarn from one pound, then plyed it dividing that number in half.
840 x 8 = 6720/2 = 3360 yards per pound
a 2/10 (or 10/2) yarn would be:
840 x 10 = 8400/2 = 4200 yards per pound
And so on
However!
A yarn is not just how many yards per pound it has. It is also the quality of the fibre it has been spun from and the method of spinning used *and* the number of twists applied to the single and then the ply. No, they won't necessarily be the same.
An open end system is much like woollen spinning - the fibres are disorganized, lots of air is trapped in it, it is loftier and weaker than...
...ring spun yarn which is spun from (generally although not always) longer fibre staple, with fibres aligned, denser with less air trapped in it and stronger than open end spun yarn even when spun from the same quality of fibre as the open end spun yarn.
8/2 is more absorbent than 2/8. 8/2 is dustier than 2/8 (evidenced by the degree of lint left on the loom after weaving a warp using 2/16 for warp and 10/2 and 16/2 for weft).
The only thing the numbers tell is the number of yards per pound or meters per gram (or 100 grams or other metric unit). Even then, that number is only ever *approximate*.
Unfortunately the numbers have become muddied and are now used interchangeably. For those who say I'm wrong, I suggest they take a look the Jaggerspun Yarns website to see that they *still* identify their worsted (ring spun) yarns as 2/x, 2/y, 2/z.
The numbers do not tell a weaver everything they need to know about a yarn. Only by weaving with it, using different densities and weave structures, and then wet finishing it, will a weaver know the potential locked within the yarns that they are using.
I received complimentary copies of the last two issues of the Guild of Canadian Weavers bulletin. Jane Stafford is doing a column for the bulletin and she addressed this issue of needing to weave, weave, weave samples in order to understand how a cloth is brought to life, to serve its purpose with integrity.
If someone wants to really delve into the craft, Jane is crafting a series of on line classes that I strongly suggest everyone take. If you sign up now you get access to all of the presentations. She is taking this entire year to take a deep dive into twills.
Strongly recommended for people who want to understand this craft below the surface.









