I'm sorry to be a stickler, but it is actually not conclusive that what
Lorri has is linen on the basis of Jane's evidence. Jane's second cone,
which is labeled linen, has a different stock number (9051 instead of
9052). We still don't have a 9052 with an outer label on it. Neither of the
two cones in the picture, that are definitely labeled linen, match either
cone color of the 9052's. And Jane's 9052 is size 140/2, which is very fine
for a linen--not impossible of course, but less likely.

It would be nice to have Lorri's thread examined under higher
magnification. First, there's a quality difference:
"If you have access to a microscope, telling cotton and linen apart is
quite easy. Pick a few fibres off a thread and place them under the
microscope. Linen has smooth, straight fibres while cotton looks almost
wooly. It's a bit like straight vs curly hair." (
http://www.marquise.de/en/themes/howto/stoffkunde.shtml)

Secondly, and I think this is definitive, linen fibers and cotton fibers
come from different parts of the plant. Linen fibers are from the inner
bark of the flax stem ("bast fibers") and show nodes along their length.
Cotton fibers, from seed hairs in the flower head, do not have such nodes:
"An important property of bast fibres is that they contain a special
structure, the fibre node, that represents a weak point, and gives
flexibility. Seed hairs, such as cotton, do not have nodes."  (
https://en.wikipedia.org/wiki/Bast_fibre)

Also, there are details of the burn test that would be more evidence,
although not nearly as definitive as the fiber structure. The website
http://mytextilenotes.blogspot.com/2010/02/distinguishing-linen-from-cotton.html
has a distinguishing criterion:
"5. On burning a linen thread, the fibers lie in the same position as
before with no change except the scorched appearance. Burning a cotton
thread causes the fibers to spread like a tuft."

Back to the lab bench, Lorri!!

Nancy


On Thu, Sep 6, 2018 at 4:55 AM, Jane <[email protected]> wrote:

> ...
> One is on a grey cone with an internal sticker
> ART 9052
> 140/2
> ...
> The second cone is blue with an internal sticker
> Art 9051
> 100/2
> ...
> The main thing is that this second cone is unused and is in its original
> wrapper. The wrapper has a sticker stating (in blue ink)
>
> Fil de Lin a Dentelles
> ...
> I've just searched on line and there is a photo on the website
> https://bobbinlace.online/2017/09/24/thread-use-bobbin-lace-
> use-linen-bobbin-lace-thread/
> that shows two cones on the left of the picture, one is blue like mine,
> the other is green with a red label. The article makes clear that these are
> linen threads
>
> So you are correct in that the thread is linen.
> ...

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