1.2.3) change the shades (hue angle)
Table 4 show changes of the shades (hue angle) of skin color, เปลือกลำไย by on 0 of preservation. All treatments were not different shades, the average 75.90 - 77.45 ° h then when the shelf is increasing. The shades of the color of each process tended to increase. On 24 of preservation. Process of sodium metabisulphite bisulphite concentration 10% adjust pH4 with citric acid. The shades (hue angle).Is 81.13 but no difference of sodium metabisulphite bisulphite concentration 10% adjust pH4 with sound intensity level and process sodium metabisulphite bisulfite. The concentration 10% adjust pH2 with sound intensity level, which is 79.55, and 79.38 respectively. The process control, process of citric acid concentration 5% (pH4) and process คอบิก ascorbic acid concentration 1% (pH4) were shades (hue. Angle) is 71.47 and minimal 70.49 71.03 respectively
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