: I have very limited experience with different skins but have been told that
: each roll of fabric will be different. Some will loosen up while others
: will hold their tightness. The person who sold you the material would know
: best about the characteristics of that particular roll of material. My 7
: oz. nylon skin is 5 years old and hasn't slacked at all. It stays drum
: tight in all conditions. I guess I'm very lucky.

That likely holds true for general polyester, it doesn't hold true for aircraft Dacron, it's virtually exactly the same year to year let alone roll to roll.

Bill H.