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Mark Harris

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I am also wondering how you measure diameter of something that is intrinsically not a firm circle in cross section?  Interesting one that!
Last Edit: July 13, 2012, 11:44:44 PM by Mark Harris

Dmitrii Novgorodtcev

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And I think that the diameter is changed after PE is submerged into water. So, in working condition it might be different to dry condition. I wonder if this change differs much between Dyneema and spectra and if we can compare spectra and dyneema dry without being wrong about their diameters in working (wet) condition?
Last Edit: July 13, 2012, 10:03:58 PM by Dmitrii Novgorodtcev

Dmitrii Novgorodtcev

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Thinking about my previous post, I came to thought that PE is a material which does not absorb water, so ots diameter must be the same in both dry and wet condition.... what about spectra? does it absorb water? I am not aquainted with this material....

Paulus Van Gaal

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I am also wondering how you measure diameter of something that is intrinsically not a firm circle in cross section?  Interesting one that!
Hi
It's measured with a low pressure digital indicator, first on the flat, then spiral wound up to 10 times per inch, until the width has become sufficient to provide a second measurement. The two measurements are then averaged. I have cross checked this with a microscope to verify that the system is close to actual, but a lot faster to do.
Keep in mind that all the lines are measured in the same manor, so comparisons can be made between them.

The Pe fiber itself does not hold water, but the gaps between them does, this situation is minimized if the braid has had after treatments, to reduce it's overall size, and compress it, one way of putting it it's like combing your hair and setting it i guess. Only a few braider's do this.
a worn braid will hold more water than a new braid, as does more pics per inch hold more, a poor quality dyneema line will hold more.

The Pe number system is of little benefit as its a total unknown number, but it allows a manufacturer to drop a line into a group, like its between this and that, but if you are bending the truth a little (some more than others) then its dropped into the next group, as that line has a bs of X and is expected to be X in diameter.

Paulus

http://www.paulusjustfishing.com/4linetesting.htm

Dmitrii Novgorodtcev

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Paulus,
What about Spectra? Does it hold water? or it is similiar to Dyneema in this?

About number specification of PE used in Japan
It is quite definite number, I think. At least, as far as it concerns known japanese makers starting from December 2010. There was a convention among line makers about PE which fixed rules of PE specification. They fixed that the certain number of PE must be equal to certain weight of the line in Denier units. 1 Denier equals to the case when 9000m of the material weighs 1g. If we transfer to grams, 9000m of PE6 must weigh 1080g, PE8 - 1440g, PE10 - 1800g. But the problem for us, users, remained unchanged. What's the point in knowing the line weight for a certain length, in case we still do not understand the actual diameter of PE to compare it between makers? May be, knowing the length, specific weight of the PE material and the actual weight of the length some specialistsl can calculate diameter somehow (not me), but I think it is still not clear for final user...

In approximately the same time they also fixed relation of the line number and its actual diameter in mm for nylon and flurocarbon lines. After that it must become more clear for the users. For example, #10 for nylon or fluorocarbon must be 0,52mm in dia for any maker and for both nylon and flurocarbon. I wish they made some similiar system for PE, but it must be very difficult due to the specific nature of PE material... So, such information which is placed on your site, Paulus, (actually measured diameters) is an absolute gold for anglers, I think. Thank you!
Last Edit: July 14, 2012, 03:31:11 PM by Dmitrii Novgorodtcev

Paulus Van Gaal

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Hi Dmitrii

The Spectra and the Dyneema material are similar in make up, In fishing line when Spectra is used its a known number, like the 1000 series, when Dyneema is used they seldom tell you what series is used, and you have many forms of it. One indicator is diameter verses breaking strain, that is why I always measure it.
The water holding capabilities of fishing line also comes from the number of strands in the line, 8 strand lines blend in very well together and pack tight, 6 strand lines are not to bad but with 4 strands it becomes ropey. If you use a poorer quality fiber then it is thicker for a given bs so holds more water.
It's more the after treatments of a braided line that reduces the water holding capabilities of a line as it blends the fibers into each other.
Also coatings can play a part, some reduce water holding capabilities others can increase it.

I think you need to look at each line and access it.

Here are two lines you can see the difference between a good line and a poorer line.

http://i159.photobucket.com/albums/t154/Paulusvg/bim5.jpg

The PE number system will never work, as far as quoting mono equivalents also does not work, stating that lines are thin sells lines even if they are not.
You also need to take into account that what is written on the box may not be what is wound on the spool.

Paulus
http://www.paulusjustfishing.com/4linetesting.htm