2.4. Colour measurement
The reflective surface colour of breads was measured on crumb,
using a R80 Colour Measuring System (Nippon Denshoku Inc., Tokyo,
Japan), and L, a and b values were recorded. The L value represents
lightness component on the surface, and the value ranges
from 0 to 100 for darkness to whiteness, while a and b values are
chromatic components of redness (+) to greenness () and blueness
(+) to yellowness (), respectively. Each type of bread sample
was individually measured in triplicate. Whiteness index (WI) was
calculated on the basis of the following equation
2.4. Colour measurementThe reflective surface colour of breads was measured on crumb,using a R80 Colour Measuring System (Nippon Denshoku Inc., Tokyo,Japan), and L, a and b values were recorded. The L value representslightness component on the surface, and the value rangesfrom 0 to 100 for darkness to whiteness, while a and b values arechromatic components of redness (+) to greenness () and blueness(+) to yellowness (), respectively. Each type of bread samplewas individually measured in triplicate. Whiteness index (WI) wascalculated on the basis of the following equation
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