Thử bền màu ánh sáng Trufade: 

Len xanh chuẩn

Blue Wools – European
ISO Blue Wool Standards Nos. 1 – 8 – per set (8)
ISO Blue Wool Standards Nos. 1-8 [pre-mounted 10mm wide strips on card] – per pack (10 cards)

Code Blue Wools and Fading Standards – American
AATCC Lightfastness Standard L-2 – per pack (50 x 75cm)
AATCC Standard of Fading for L-2 – each