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A palette knife is a blunt tool used for mixing or applying paint, with a flexible steel blade. It is primarily used for mixing paint colors, paste, etc., or for marbling, decorative endpapers, etc. The "palette" in the name is a reference to an artist's palette which is used for mixing oil paint and acrylic paints.
Art knives come primarily in two types:
- palette knife resembling a putty knife with a rounded tip, suited for mixing paints on the palette;
- painting knife with a pointed tip, lowered or "cranked" like a trowel, suited for painting on canvas.
While palette knives are manufactured without sharpened cutting edges, with prolonged use they may become "sharpened" by the action of abrasive pigments such as earth colors.