However, a
and b values of tofu prepared without shell powder were
not significantly (p > 0.05) different from those of tofu prepared
with 0.05% addition of shell powder. The yellowness
(b value) increased with increasing amount of shell powder.
No significant difference (p > 0.05) in a and b values were
also observed between no addition and 0.05% addition of
shell powder. With increasing the amount of shell powder
addition, there were trends of decrease for L value, but