There was a Tennis Warehouse podcast a while back with the head of string development at Head Tennis. He was asked about the effect of color pigment on string performance, and he said that the amount of pigment in the formula is so small that their detection devices can't measure a difference. That's not to say there is no difference, just that if there is a difference, it's minimal. However, there are some strings that are exactly the same products save for the color pigment, and their lab results show significant variation in tension loss.
To me, this is more likely to be a discrepancy in the Tennis Warehouse testing than a significant performance difference:
Property | Signum Pro Poly Plasma 17 (1.23) | Signum Pro Poly-Plasma Pure 17 (1.23) | Difference % |
---|
Material | Polyester | Polyester | NA |
Stiffness (lb/in) | 198 | 199 | 1 |
Tension Loss (%) | 26 | 43 | 65 |
Energy Return (%) | 88 | 84 | -5 |
Spin Potential | 5.4 | 5.2 | -4 |
String to String Friction (COF) | 0.089 | 0.086 | -3 |
String to Ball Friction (COF) | 0.483 | 0.449 | -7 |