Table 1.
Specifications of tested fabrics (A) and commercial sunscreens (B). FD = fully drawn, DTY = drawn textured yarn, D = denier *, f = filaments. All knit fabrics are 28 gauge.
| (A) Fabrics | |||
| Fabric | Yarn(s) |
Areal Density
(g/m2) |
Thickness (mm) |
| Nylon Woven | 70D(48f) × 160D(144f) | 107 | 0.36 |
| Polyester Pique Knit | 75D(72f) × 75D(36f) FD | 180 | 0.74 |
| Polyester Interlock Knit | 50D/72f FD DTY | 90 | 0.48 |
| Polyester Interlock Knit w/TiO2 dot print at 30% surface coverage | 50D/72f FD DTY | 95 | 0.46 |
| (B) Commercial Sunscreens | |||
| Sunscreen | Labeled SPF | Active Ingredients | |
| Sunscreen A | 30 Broad-spectrum |
avobenzone 3%, homosalate 8%, octisalate 4.5%, octocrylene 6% | |
| Sunscreen B | 50 Broad-spectrum |
avobenzone 3%, homosalate 10%, octisalate 4.5%, octocrylene 8% |
|
* Denier is a measure of linear density, an indicator of yarn or filament size. More specifically, denier is the weight in grams of 9000 m of yarn or filament.