Chalk is a soft powdery white or off-white writing or drawing material in crayon form, generally used on a blackboard or other dark surface

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  • Tacita Dean, 'The Roaring Forties: Seven Boards in Seven Days' 1997

    Tacita Dean
    The Roaring Forties: Seven Boards in Seven Days 1997
    Chalk on blackboard
    support, each: 2438 x 2438 mm
    Presented by the Patrons of New Art through the Tate Gallery Foundation 2000 Tacita Dean, courtesy Frith Street Gallery, London and Marian Goodman Gallery, New York/Paris

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  • Juan Gris, 'The Sunblind' 1914

    Juan Gris
    The Sunblind 1914
    Gouache, collage, chalk and charcoal on canvas
    support: 921 x 727 mm frame: 1001 x 812 x 79 mm
    Purchased 1946

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  • attributed to Francesco Bartolozzi, 'Eros and Psyche' date not known

    attributed to Francesco Bartolozzi
    Eros and Psyche date not known
    Pencil and chalk on paper
    support: 335 x 337 mm
    Purchased as part of the Opp Collection with assistance from the National Lottery through the Heritage Lottery Fund 1996

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  • Thomas Gainsborough, 'Wooded Landscape with Peasant Asleep and Horses outside a Shed' circa 1775-80

    Thomas Gainsborough
    Wooded Landscape with Peasant Asleep and Horses outside a Shed circa 1775-80
    Pastel and chalk on paper
    support: 254 x 314 mm
    Presented by T. Birch Wolfe 1878

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Chalk is an inorganic material composed of calcium carbonate. It is naturally occurring, but has also been produced industrially throughout the twentieth century.