Random questions to which you seek an answer
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@pechelman said in Random questions to which you seek an answer:
The easy way to measure this is to measure the thickness of the fabric.
@Karol since you asked the question and sent me down this rabbit hole. tagging you
Easy I said....
SO I spent a bit of time going through a bunch of jeans and fabrics attempting to measure them. It's not straight forward as one might think. Still, I did my best, and here's the method used;Fabrics were doubled up in a low wear area like near the hem or on the side of a shirt.
Doubled fabric was used to save me some time and in attempt to get a little more resolution in the thickness.
A Starrett micrometer with a friction click clutch was used to take measurements
Multiple measurements were taken and I averaged them.
When multiple garments with the same fabric were available I also averaged them.
Thicknesses shown are those I took divided in half, so it should be somewhat representative of a single layer of fabric.Things I learned or thought about during the process;
There's a lot of compliance in fabric. Even with a consistent measuring technique,
Thicknesses are relative at best.
Density measured in the manner is highly questionable given 19L and 14oz are right next to 16 slubby.
Actual fabric surface weight is unverified and may be introducing large error.What would I do different?
I wouldnt do this again. Getting the raw fabric from a roll and measuring out precise swatches to actually weigh and measure would be "better". Even "better" might be to use a permeability meter as is used for measuring breathability in technical garments like goretex.Still, here's what I came up with for giggles. At least I can say I was fairly repeatable in my measurement method with a pretty solid relationship between fabric weight and thickness.
if anyone wants my excel sheet let me know and i can email/message it to you
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@pechelman dude this is hardcore — love it!
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Thanks!
I rushed to do all this with cooking dinner, taking care of a sick wife, doing dishes, and a hasty write up. I'm wondering a bit more about fabric weight in general now. Is it really weighed or is it an approximate value based on fabric or yarn thickness instead? That might begin to explain the good correlation between oz/sqyd and thickness measurements whereas there's a very poor relationship to relative density and what we all know to be empirically true through wear. -
@pechelman congratulations my friend
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@pechelman It almost looks like you need to be a... rocket scientist? to come up with that kind of chart
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@pechelman waking up to see this is the best!!!
You made my day. The scientific method galore! I’m starting to study the results. -
@Graham said in Random questions to which you seek an answer:
Bazinga.
Guessing you’re a fan of the Big Bang Theory. One of my all time favorites.
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Wow @pechelman this is the best denim-nerd mad scientist ish I’ve seen in a while. Bravo
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thanks y'all. Hopefully no one thinks this is me trying to be authoritative or whatever. The density results are kinda meaningless imo, which is why I intentionally called it "relative density" and omitted any real units, but I thought it too ridiculous not to share.
I am genuinely curious about how fabric weight is determined now if one of the crew might be able to shed some light. Is the final woven fabric actually weighed in some method or is it based on some characteristic of the input yarns? Or something else?
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@pechelman Freaking real deal denim science....seriously rad! Even if its not necessarily "Authoritative" some real thought and effort went into this.
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@pechelman The way I understand the technique is that a cutout of a specific size is made, weighed, and then it‘s calculated from there.
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This post is deleted!
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@tody said in Random questions to which you seek an answer:
@pechelman The way I understand the technique is that a cutout of a specific size is made, weighed, and then it‘s calculated from there.
I think it’s a square yard of the fabric.
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@Jett129 This is what I found online: https://stonemountainfabric.com/what-gsm-means-and-how-to-use-it/
So that type of cutter is used:
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From the little I know through other hobbies from audio, knives, sharpening, fishing, etc, Japan has their own highly-intentional way of doing everything. I wouldnt be surprised if this was the case here also with measuring or calculating fabric weight and it might differ from what's standard in "the West".
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@Jett129 Here's a conversion table: https://www.ginifab.com/feeds/ozyd2_gm2/
You just have to convert both units, oz to grams, and square yard to square meter.A lot easier than converting fuel consumption, where you go by miles per gallon, and we go by liters per 100km, so there is a totally different reference point.
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Not sure where else to ask this.
