Which is a common consequence of high humidity while mixing impression materials?

High humidity can influence the setting characteristics of impression materials in a significant way. In particular, increased moisture in the environment tends to accelerate the chemical reactions that occur during the setting process of some materials, leading to a decreased setting time. This is due to the fact that many impression materials rely on an exothermic reaction to polymerize or harden, and when humidity is high, the additional moisture can enhance the reaction rate. Consequently, dental professionals must be aware of environmental factors such as humidity when mixing impression materials, as improper timing can affect the accuracy of the impressions taken.

Factors like increased working time or inconsistent setting time are generally not associated with high humidity. Instead, the critical concern is that the materials may set more quickly than anticipated, which can compromise the quality of the impression if proper adjustments in technique are not taken into account.