Originally Posted by Someone Else
What does "10 % pre-stretch" mean?
And why pre-stretch the natural gut mains but not the co-poly cross string?
(Not an expert so someone correct me if I am wrong)
Pre-stretching does 3 things I am ware of:
1: Alleviates coil memory.
2: It takes some of the elasticity out of the string making it less lively.
3: By taking out some elasticity tension maintenance is better.
The % refers to what % over reference tension to pre-stretch. 24kgs is about 53 lbs so the pre-stretch was about 58 lbs.
My guess: Because poly has little to no tensile strength; pre-stretching poly would take too much elasticity.