You are right Dacron is pretty old, actually been around longer than mono. It is not Polyethylene though, it is Polyester. It is only slightly thinner than the same mono, and IGFA means that it will break at or BELOW the said lb class. Normal lines must break above the pound test. IGFA lines are for people going for records.Dacron is old school and has been around for years. It's made from the PET which is the same materials that they make soda bottles out of. It's larger in diameter than "braid" and its no where the strength of the present day braids which are made from Kevlar and the likes.
I use mainly as backing since it doesn't stretch like mono.
As a matter of fact, I do hate planer boards! I have outriggers & know how to use them. Wire off the back of the boat & gunnals, Dacron off the outriggers. Everyone knows where my lines are running cause they can see 'em!4 wirelines, now you're talking! Why haven't we fished together before? Say you hate planer boards. Do you have a single sister?:thumbup: