Which of the following methods does NOT effectively delay the setting time of Zinc oxide eugenol impression paste?

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Incorporating a small quantity of glycerinMixing in a small amount of waterChanging the proportions of the two paste componentsUsing a chilled mixing surface

Explanation

To slow the setting of Zinc oxide eugenol impression paste, you can add glycerin, adjust the ratio of the two pastes, or use a cooled mixing slab. However, adding water does not delay the setting time and is therefore not effective.