Seted pH

pH bath

pH before heating

pH aqueous gel

pH evap 2

pH evap 3

pH gel

Lot 4.5

4.8

4.5

4.2

4.5

4.3

4.1

Lot 4.9

4.7

4.9

4.5

4.7

4.4

4.6

Lot 5.6

4.8

5.6

5.1

4.9

4.7

4.9