OK Bubble-Doubter...
Hello Hans!

99% of the time I fish soft hackles in the surface
film or slightly below. Whatever gas bubbles
LaFontaine had referred to regarding caddisflies is
not exactly what I was trying to imitate when I added
that bit of fluff to the existing pattern because, if
I understand his writing correctly, most of his
paterns pertaining to this subject were to be fished
very well submerged. 

On flat water there is nothing on the surface that
causes any unique refraction or reflection of light.
With an emerging insect in the middle of that piece of
flat water it becomes an entirely different situation.
If you watch an emerger stuck in the meniscus you will
notice that the way the water is "bent" during the
emergent penetration of the surface looks very similar
to a bubble and it is entirely possible for some gas
to be trapped as a bubble while the insect is
wriggling around. Because the whole process I
witnessed happened fairly quickly and was on moving
water it is difficult to say that what I observed is
in fact a true bubble of gas (air) or just the
disturbed surface of the water resulting from the
insect popping through it. 

What I do know is that after witnessing both caddis
and especially mayfly emergences I went home and made 
air bubbles in a cup of water with an eyedropper. When
then looking at those bubbles from underneath the
difference in the way light is refracted is quite
significant. Then came time at the vise...glass beads
wouldn't allow the fly to be fished where I wanted it
and Krystal Flash and Flashabou were too obtrusive. I
wanted a subtle hint of flash that didn't take away
from the sexiness and allure of the traditional
pattern...and I think I was successful on all counts.
The Improved patterns don't look that much different
than the originals and, in my experience, they work
better.    

I believe it was Iain that mentioned reverting back to
using the silk that the original patterns were dressed
with. This is a very good point that should not go
unnoticed. Silk has qualities that are not easily
replicated and, just as a few strands of Antron can
make a difference, so too can something as simple as
the thread we use. Pearsall's is widely available and
although more expensive than regular tying thread,
adds to the fly in a way that polyester or nylon
thread just can't imitate.

Hope this helps to clarify the stirred pot. 

Happy Holidays All!
Don  


--- Hans Weilenmann <[EMAIL PROTECTED]> wrote:
> On 22 Dec 2002 at 12:01, Don Johnson wrote:
> 
> Hi Don,
> 
> Interesting modifications.
> 
> I understand the (rayon) floss shellback, even if a
> thread tag rib 
> might serve the same purpose, but...
> 
> > Rather, it was my intent to have the Antron
> > add just a little flash at the point on the fly
> where
> > the emergence (from nymph to dun) would be
> initiating
> > (at the wingcase) as is the case with a natural
> insect
> > during the emerger stage when a gas bubble or
> bubbles
> > have formed. 
> 
> ... which gas bubble or bubbles are you referring to
> here?
> 
> Cheers,
> Hans
> 



=====
http://www.geocities.com/salmn8r/caddisforkids.html

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