*4.4. Moisture Content*

The hydrogel film strips (3 cm × 4 cm) were examined for their moisture content (MC). The film strips were dried at 105 ◦C and the difference in weight was calculated before (W1) and after drying (W2), according to Equation (3).

$$\text{MC} = \frac{\text{W1} - \text{W2}}{\text{W1}} \times 100 \tag{3}$$