Packed full of pigment with organic binders, watercolors in tubes are a beautiful, convenient form of paint, providing saturated color with consistent results. The paints may be used straight from the tube for optimal color saturation; they may also be mixed with water for lighter hues and washes. Because the pigment load is high for these paints, they apply vibrantly. They also mix well, creating a full spectrum of amazing color. The binder in these paints traditionally is gum arabic, which is a tree sap; some formulas include honey and other natural ingredients. Most watercolors may be reactivated with water after they dry. Neatly packed in their small, portable tubes, they are perfect for painting en plein air or on the move.
Source: artnews.com
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