How Do Not Bleach Works
The crossed triangle is the most safety-critical symbol: bleaching wool and silk dissolves protein fibers; bleaching spandex (elastane) destroys stretch in a single wash; bleaching dyed fabrics removes color unevenly. Stain emergencies have gentler answers: enzyme pre-treatment, short oxygen soaks (if the label merely lacks a bleach symbol, rather than crossing it), and professional cleaning for the irreplaceable.