2.3. Instrumental measurement of colour A Minolta CM-2002 (Osaka, Japan) spectrophotometer was used to measure colour at the surface of a 2 cm-thick LTL chop at 72 h p.m. exposed to air for 2 h. The illuminant used was D65 and the standard observer position was 10°. The parameters registered were CIE L* (lightness), a* (redness), and b* (yellowness). Each value was the mean of ten observations on the same chop, avoiding areas with excess fat.