I got a filler spool of Seaguar Red Label and filled a reel with it to try.  A fine talc like powder came off it while I held the line taught between my fingers.  I wonder if the spool was really old and on the shelf for a long time.   It seems limp on the reel.

I'm not sure any line should ever do that

i've never seen it before with any of the fluoro i've used...

i think it is caused by old line . i got some Seaguar Carbon Pro that was marked down and when i spooled it on a reel i ran it thru my fingers and got that chalky residue you are talking about , i am positive it had sat on the shelf for a long time . anyhow , maybe Seaguar floruocarbon does that when it gets old  :-/

Maybe contact Seaguar and ask them...?

Its silicone.

Silicone?  Can you explain?

I remember a spool of mono did that to me, but that was back in the 80's 

I had the same problem a while back and contacted Seaguar about it. It is a treatment that is on the line to keep it from sticking and drying out. They advised that it washes off the first time it gets wet and does not have any affect on the line.

Thanks Tenn.Shad.   I new the line wasnt too old and it did feel limp and work well when I tried it.

my spool of carbon pro was ancient !! it was like $3.00 for a 200 yrd. spool .....  ;D

It's just a silicon coating. It's no big deal. It keeps the line from sticking and fraying while going through the machines at the factory.

Be careful with that red label it can be a handful/ Personally I love InvX, but I plan to try Carbon Pro and some others.