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Modding / BAC Mod Weaving yardage.
« on: June 25, 2023, 07:51:09 PM »
Now, for balance and sanity reasons this probably shouldn't be changed, but I happen to be a spinner and weaver IRL, and I've some thoughts on the yardage of thread used in weaving.
Weavers calculate the yardage of thread based on several different factors: the length of a given piece of fabric, the width of a given piece of fabric, its sett (how many threads per inch), and lastly shrinkage factor.
Shrinkage comes into play because threads are stretched to have them woven, and when you take them off the loom their elasticity shrinks back in. Normally shrinkage, depending on the fiber, is about 10% (with wool especially).
There's also the header and the foot of the fabric, which is loom waste. You find especially little loom waste with the warp-weighted looms in the BAC mod, and with backstrap looms, so I'm not too concerned about this, but typical loom waste for a rigid heddle loom is about 12 to 18 inches, and loom waste for a jack, countermarch, or counterbalance loom is about 24 to 36 inches.
The sett depends on how thick or thin the threads are. In general most fish yarn (cotton yarn used for warp in Scandinavian rug weaving) weaves up at about 12 ends per inch. So that's 12 threads of warp, + 12 threads of weft, for 24 threads per square inch.
Multiply that by the length and width of a given piece of fabric — let's say we're weaving 2ft by 4ft sections here.
That's 1152 square inches, multiplied by the threads per square inch, + 10 percent for shrinkage. That gives you 2534.4 ft of thread required, without calculating loom waste OR the amount of clothing you need for a garment.
I'm honestly not sure anyone would continue spinning and weaving using BAC if you actually did change the numbers to be accurate to RL weaving, though. But it's just a little curiosity fact stuff that I happen to specialize in.
Weavers calculate the yardage of thread based on several different factors: the length of a given piece of fabric, the width of a given piece of fabric, its sett (how many threads per inch), and lastly shrinkage factor.
Shrinkage comes into play because threads are stretched to have them woven, and when you take them off the loom their elasticity shrinks back in. Normally shrinkage, depending on the fiber, is about 10% (with wool especially).
There's also the header and the foot of the fabric, which is loom waste. You find especially little loom waste with the warp-weighted looms in the BAC mod, and with backstrap looms, so I'm not too concerned about this, but typical loom waste for a rigid heddle loom is about 12 to 18 inches, and loom waste for a jack, countermarch, or counterbalance loom is about 24 to 36 inches.
The sett depends on how thick or thin the threads are. In general most fish yarn (cotton yarn used for warp in Scandinavian rug weaving) weaves up at about 12 ends per inch. So that's 12 threads of warp, + 12 threads of weft, for 24 threads per square inch.
Multiply that by the length and width of a given piece of fabric — let's say we're weaving 2ft by 4ft sections here.
That's 1152 square inches, multiplied by the threads per square inch, + 10 percent for shrinkage. That gives you 2534.4 ft of thread required, without calculating loom waste OR the amount of clothing you need for a garment.
I'm honestly not sure anyone would continue spinning and weaving using BAC if you actually did change the numbers to be accurate to RL weaving, though. But it's just a little curiosity fact stuff that I happen to specialize in.