Figure 2.

SEM pictures of a PA rip-stop fabrics treated with a C₆F₁₃–SFP finish. Unexposed controls are shown in comparison to “sealed controls” and exposed fabrics with different exposure times and after applying abrasion and washing. Warps (blue frames) and weft fibers (yellow frames) are also displayed in higher magnification. Numbers in the upper right corner of the SEM pictures refer to the color change assessed with the Gray scale in comparison to the unexposed fabrics (scale 1–5; 5 = no visual change 1 = a large visual change).