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A Wet palette is simply a box with a sponge at the bottom that holds water for the sole purpose of keeping your acrylic paints moist and workable for long periods. On top of the sponge, some type of semi-permeable and resistant paper is placed, so it permits the absorption of water without letting paint through, not falling apart due to the effect of water and the friction of the brushes.
Acrylic paints tend to dry quite quickly, especially in summer and warmer countries. That's why they are really good to use because they can retain the paint's moisture for many days or even months, so you won't have to remix color mixes over and over again when they dry out. The main extra feature of delayed drying, also allows you to apply advanced trickier techniques, such as blending and glazing, and most importantly, not waste paint and time anymore.
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