Can you tell fluorocarbon from nylon monofilament ?

Shimano Penn

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I have always wondered if there is a way to tell fluoro from regular mono, maybe some trick with light or involving submersion in water? Sometimes I pull out a jig or something I rigged two years ago and can't for the life of me remember how I rigged it, hate to throw away perfectly good fluoro if I don't have to :rolleyes:
 

Texas Tuna

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Fluoro is denser than water and sinks pretty quickly. Mono will float/suspend depending on the manufacturer. Just cut a little piece and drop it into a cup.
 
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Luke

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I cut mono with my teeth but can not even dent FC. I know I should not but always have, hard habit to break.
 
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ShadowX

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If you have a fish tank, dunk both the mono and fluoro into the tank and see the difference. After doing that, I haven't used mono leaders anymore other than for trolling rods.
 

hucklongfin

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Put them both in water. If you can't see it, it's fluoro. That's 'cuz those of use who see in air are optimized to see the same frequencies as those who live in water. Pretty cool, huh?
 
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ShadowX

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Put them both in water. If you can't see it, it's fluoro. That's 'cuz those of use who see in air are optimized to see the same frequencies as those who live in water. Pretty cool, huh?

It has nothing to do with frequency.

It all due to the index of refraction value. Fluorocarbon has index of 1.42 while mono has 1.55. Water has index of refraction of around 1.33 to 1.35 depending on the salinity of the water. The closer the numbers are, the visibility is less.

There are less light reflecting off the outer surface of the fluorocarbon since the values are close. If the index perfectly matches the water, you would become completely invisible. Since there is still a slight mismatch, you can still see the fluorocarbon under water.

Watch this cool video showing what happens when the index of refraction is perfectly matched:


Here is someone showing the difference in a fish tank. The mono is a lot more visible.
 
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Carl

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    So what's the deal with pink vs clear fluoro?
     
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