Table 2.

Estimated gel layer height and strength at the gel–solution interface tested in pH-changed media (n = 5).

Immersed Time	Estimated Gel Layer Height (mm) (Mean ± SD)			Gel Strength at Gel–Solution Interface (mPa) (Mean ± SD)
	IPM	5E	10E	IPM	5E	10E
15 min	0.93 ± 0.15	1.73 ± 0.06	2.17 ± 0.32	0.213 ± 0.075	0.034 ± 0.002	0.029 ± 0.017
30 min	1.17 ± 0.15	1.90 ± 0.10	2.70 ± 0.28	0.147 ± 0.034	0.023 ± 0.005	0.011 ± 0.004
2 h	0.60 ± 0.20	4.03 ± 0.25	4.63 ± 0.35	0.047 ± 0.022	0.015 ± 0.003	0.006 ± 0.001
4 h	0.70 ± 0.28	5.00 ± 0.00	5.00 ± 0.00	0.041 ± 0.023	0.015 ± 0.003	0.006 ± 0.003