Opened 12 years ago

Closed 9 years ago

#41 closed enhancement (fixed)

Add textile units

Reported by: Werner Keil Owned by: Gunther Schadow
Priority: major Milestone: Revision 1.9
Component: Keywords:

Description (last modified by Gunther Schadow)

I looked at the codes so far and found nothing for the textile industry. Working in Egypt at the moment, I learned, a unit called "Thread Count" was the officially used one by the industry, but the SI has its own unit called "tex".

At least that one, maybe also commonly used and still alive units should be added. If UCUM aims at supporting B2B in industries producing Cotton and other textiles, still a big industry in the US AFAIK, rather than supporting mainly one of the largest consumers of cotton (healthcare ;-) I belive this should be added.


Change History (7)

comment:1 Changed 12 years ago by Werner Keil

The actual unit I came across is named "TPI" in Wikipedia. As it looks like even Industry Standard Organizations and US Trade Officials have spent effort on this, adding it to UCUM seems like a good sign. Probably consulting them, too.

comment:2 Changed 12 years ago by Gunther Schadow

As always, requests for new units should come with references.

I would bet a lot that SI does not have a unit called "tex" or I would at least be very surprized.

TPI is as useless a unit as GPF. It's just 1/in. We do not have a unit DPI either. Because a thread or a dot or a flush are not physical quantities. We also don't have RPMs, we have 1/min.

comment:3 Changed 12 years ago by Werner Keil

I guess it's probably best to get the textile industry involved where necessary.

The reference for where those units are quoted points to Wikipedia. That URL literally quotes tex to be a "SI" unit, but it may only mean the "most official" or international one, not being part of the SI catalogue.

comment:4 Changed 12 years ago by Werner Keil

Priority: criticalmajor

comment:5 Changed 10 years ago by Gunther Schadow

Owner: set to Gunther Schadow
Status: newassigned

The Wikipedia link is actually pretty thorough.

"Denier (play /ˈdɛnjər/) or den is a unit of measure for the linear mass density of fibers. It is defined as the mass in grams per 9,000 meters."

I suppose this could pass. Enough information given in the reference.

Next step: check the symbols "tex" and "den" and their combinations for conflicts. We could add this.

comment:6 Changed 10 years ago by Gunther Schadow

Milestone: Revision 1.9

comment:7 Changed 9 years ago by Gunther Schadow

Description: modified (diff)
Resolution: fixed
Status: assignedclosed

So this definition would be

linear mass density (of textile thread)

1 Denier = 1 g/9000/m.

Why would people use such a funky number 9000? I suspect this comes from some customary unit and really is something else. But OK, let's let it be.

1 tex = 1 g/km

<u:unit id="610150" Code="tex" CODE="TEX" isMetric="yes"><name>tex</name><printSymbol>tex</printSymbol><property>linear mass density (of textile thread)</property><value value="1" Unit="g/km" UNIT="G/KM">1</value></u:unit>
<u:unit id="610151" Code="[den]" CODE="[DEN]" isMetric="no"><name>Denier</name><printSymbol>den</printSymbol><property>linear mass density (of textile thread)</property><value value="1" Unit="g/9/km" UNIT="G/9/KM">1</value></u:unit>
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