A commenter details umber's mineral composition and personal history with it
4 Sep 21 9:27 PM · 2d ago · 16 comments · 1 source · development 4 of 4
A user with family history near a former umber mine in Pennsylvania describes the pigment's composition of iron oxides, manganese oxide, and clay, adding a factual thread among the jokes.
“Composition: Umber contains iron oxides, manganese oxide, and clay. It creates warm brown shades used in art, paints, mortar, and stucco.”
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What people said 14 voices · best of 21 · verbatim
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Composition: Umber contains iron oxides, manganese oxide, and clay. It creates warm brown shades used in art, paints, mortar, and stucco. I know this because there was an active umber mine on my family's property in PA in the 1800s. Long ago abandoned, and entrance caved in now.
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Don't you carefully sauté in a field of sunflowers on a starry night until your ear drops off?
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I don't use it because everything comes out umber cooked.
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Had to pass this post on to my art teacher daughter. 😉
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There goes aunt Margie, burning the umber again
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Burnt umber is a reddish brown pigment made by heating raw umber, dehydrating the iron oxides, and partially changing it to the more reddish hematite. Some types of burnt umber are naturally found with a high percentage of hematite and, hence, are not calcined or heated.
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There ought to be an umber cooking class. They can offer lessons on how to make grilled medium-rare umber, or lightly pan-seared umber, or poached umber, or broiled at 425°F with carrots and fingerling potatoes umber.
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Historically, raw umber powder was placed in a kiln or metal container and calcined (roasted) at a controlled, moderate heat until the color transition occurred.
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They're about the same in value (lightness or darkness) and what's different is burnt having more iron oxides in it so it is redder
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Love you!! This is like my feelings about Liquid IV powder. In a world where all IVs are liquid, calling this powder liquid IV ..
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My father was an artist and I was always fascinated by the names of colors. Umber is a particularly interesting one.
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It's a fine line. Like toasting a marshmallow. From 'nowhere near' to 'aw fucking hell' in 3/1000's of a second.
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Sure they do but they eat it instead of making it into paint. I'm eating a plate of sienna as we speak!
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It's a mineral (iron oxide+manganese) used as a pigment. I don't know of any non-art used for it.
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