Porcelain

Acidic agent

Mean

Std. deviation

Noritake

Lemonade

0.88

0.47

Mineral water

1.13

0.65

Orange juice

0.96

0.40

Black-carriot juice

1.06

0.32

Coke

3.03

2.50

Total

2.66

1.99

Ceramco 3

Lemonade

0.72

0.30

Mineral water

1.26

0.37

Orange juice

1.16

0.51

Black-carriot juice

1.16

0.52

Coke

0.86

0.56

Total

1.04

0.48

Total

Lemonade

0.81

0.40

Mineral water

1.20

0.50

Orange juice

1.06

0.45

Black-carriot juice

1.11

0.42

Coke

1.16

0.78

Total

1.07

0.53