Semperfli Fluoro Brite

No tyer can be without a range of fluoro threads in their tying kit
and Fluoro Brite is a great choice. Fluoro Brite is a
twisted fluorescent thread. To get it to lay perfectly flat simply
untwist with your bobbin holder and then Fluoro Brite #4 Red can be used
as a flat floss. Fluoro Brite has the most vibrant uv which the
fish will find irresistible. Fluoro Brite has been specially
formulated for fluorescence and comes in 240 denier (3/0). Fluoro Brite s recommended for hooks 10 to 2/0 but if you want to use it for
smaller flies, Fluoro Brite  will split down further for you. Use
it as a hotspot, for ribbing, a body or even a fab hot spot tail!. For
tails we fold Fluoro Brite  four times in a loop and tie it in
the tail of a fly, cut to length then tease the fibres apart with a
dubbing brush and you get an astounding crinkled tail with what looks
like little firelights on the tail of your fly.

Since Joseph
Keen’s book – Fluorescent Flies (1964) and Thomas Clegg’s book – The
Truth About Fluorescents (1967) fly tyers have been working with
fluorescent materials. We decided to make a fluorescent thread with
advantages that it could be used as a tying thread or as a floss, could
be untwisted with the bobbin and used as a floss. Fluoro Brite was born
to be different. What is well known is that fluorescent materials do
attract trout, salmon and other species. We cannot see material effects
except under a UV torch where we see the glow. But with their visual
rods and cones capable of seeing into the UV spectrum many fish species
see this like a light in the dark. Fluorescent materials work well one
hour before daylight and one hour after nightfall. This is because even
though we cannot see them, UV rays from the sun still hit the water and
ignite your flies.

There are 25m / 27.3 yards (approx ) per spool of Fluoro Brite