Which statement is incorrect regarding minimizing water loss when working with dental cements?

The statement regarding the dispensing of liquid before powder in the mixing process of dental cements is incorrect in the context of minimizing water loss. When dental cements, particularly those that are moisture-sensitive, are mixed, it is important to follow a specific order of ingredients to ensure proper consistency and to minimize the potential for degradation or moisture loss.

Dispensing the powder first allows for better control over the ratio of powder to liquid, which is essential for achieving the correct viscosity and working properties of the cement. Mixing should properly incorporate the liquid into the powder to achieve a homogeneous mixture while also avoiding exposure to air and moisture which can adversely affect the material's properties.

In contrast, the other strategies mentioned provide effective ways to minimize water loss. Covering the cement with a damp cloth helps maintain moisture during the setting phase, which can be crucial for the cement's performance. Mixing in a controlled environment, such as maintaining consistent humidity and temperature, also prevents premature drying. Using a sealable container for mixing or storing the cement can protect against environmental factors that lead to evaporation or contamination of the material. Each of these methods supports the integrity of the dental cement, while the order of mixing utilized in option B does not align with best practices aimed at maintaining optimal moisture levels.