On 18 Nov, 15:51, "rb608" wrote:

I hope this info helps, please
email back if you have anymore questions.

Kind regards,

Zack Dalton"

Joe F.

Am still waiting for some replies on this from various people. It
seems one or two also prefer to err on the side of caution, which is
basically fair enough, although not really very informative. Two other
manufacturers quoted temperatures of 80 and 90 °C respectively, but
they were unable to explain why they thought higher temperatures might
be harmful. One guy said he didn´t know why boiling might be
detrimental, but if it is he would find out and get back to me. He
said hot water would not hurt them. He also said the leaders are made
using heat processes, but he did not know the exact temperatures
involved, and as nobody had ever asked him this before, he would like
to do some research of his own before giving me a definitive reply.

The first manufacturer said that boiling fly-lines, or exposing them
to a lot of heat for a longer period would certainly leach out some
of the softeners, and so shorten the life of the line. Some people did
hot dye their lines, but he did not recommend doing so. he said that
similar temperatures would also damage nylon for similar reasons.
This of course is not true, nylon contains no softeners, it is a long
chain copolymer, and its properties are entirely intrinsic.

Nevertheless, when I get the remainder of the answers and permission
to post them here, I will do so.

TL
MC