Paul-
Thank you for this info. I've always wondered what
denier meant. Sort of like line weight, then, right?
Certain length@certain weight=line weight or denier in
the case of thread. Why do you think it is that makers
don't mark the denier weight on their products?
Obviously if you have two similar lengths of thread
and one is a heavier denier, it must be a thicker
thread, given that they're the same material, that is.
Would be easier that the X system or at least
complementary to it.
Once again the amount of expertise and knowledge
available through this list never ceases to amaze me.
-John
Oregon
--- Paul Marriner <[EMAIL PROTECTED]> wrote:
> First let me say that while I do have some
> connection with UNI Products
> I have no financial relationship with the company.
> The world of threads became very confused a few
> years ago when certain
> companies began putting X/0 numbers on their threads
> which bore no
> resemblance to any recognized criteria. Benecchi was
> one of the
> offenders. That said, one must ask what is the
> material of the thread.
> Benecchi 12/0 and Griffith 14/0 are the INDENTICAL
> thread to UNI 8/0 -
> same diameter, same strength. They are all polyester
> threads from the
> same original manufacturer.
> The Helms article has numerous errors, mostly due to
> the measurement
> methods (I was a mechanical engineer in a former
> life). If someone has,
> or receives, this chart and wants examples of
> errors, email me off-list.
> The best way to understand thread sizes is to look
> to the spoolers like
> UNI and Wapsi that give the Denier measurement of
> the thread. Denier is
> the weight in grams of 9000 meters meters of thread.
> So, for example,
> UNI 8/0 is 72 denier, 6/0 is 135 denier. This is not
> perfect because the
> weight will vary with material; so a Danville nylon
> thread will have a
> different denier number than a polyester thread (but
> not by very much)
> even though both may have the same effective
> diameter. Diameter is very
> difficult to measure directly because most
> measurement devices or
> methods have some effect on the material itself, and
> most materials
> aren't prefectly round - like an untwisted nylon
> thread - so diameter
> has no real meaning in these cases.
> Gel-spun Polyethelene (GSP) threads are stronger for
> the equivalent
> denier but are of course more expensive. For example
> UNI Cord 12/0
> (similar to Dynacord Superfine) is a 50 denier GSP
> thread which is even
> stronger than UNI BigFly, a 400 denier polyester.
> Waxed threads are weaker than the unwaxed version -
> that is because
> every operation on a thread weakens it somewhat. So,
> just like any
> others, unwaxed UNI 8/0 is slightly stronger than
> waxed UNI 8/0.
> I'll be pleased to answer any additional questions
> about threads.
> Cheers,
> Paul
> --
> Paul Marriner
> Outdoor Writing & Photography. Member OWAA & OWC.
> Author of Atlantic
> Salmon, Ausable River Journal, Miramichi River
> Journal, and Modern
> Atlantic Salmon Flies.
=====
The River-
You passers-by, who share my journey,
You move and change,I move and am the same;
You move and are gone, I move and remain.
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