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November 03 2014

23:44
1716 07e9


historical-nonfiction:

Egyptian blue — a bright blue crystalline substance — is believed to be the first unnatural pigment in human history. Ancient Egyptians used a rare mineral, cuprorivaite, as inspiration for the color. Cuprorivaite was so rare searching and mining for it was impossible. Instead, using advanced chemistry for the time, Egyptians manufactured the color. It was made by mixing calcium compound (typically calcium carbonate), a copper-containing compound (metal filings or malachite), silica sand and soda or potash as a flux, then heating to between 850-950 C.

Egyptian blue was widely used in ancient times as a pigment in painting, such as in wall paintings, tombs and mummies’ coffins, and as a ceramic glaze known as Egyptian faience.  Its use spread throughout Egypt, Mesopotamia, Greece, and the far reaches of the Roman Empire. It was often used as a substitute for lapis lazuli, an extremely expensive and rare mineral sourced in Afghanistan. After the decline of the Roman Empire, though, Egyptian Blue quickly disappeared from use.

I hope Philosophy-in-Blue sees this. #very blue

October 08 2014

MerelyGifted
01:30

July 11 2014

22:45

June 11 2014

17:11

May 29 2014

19:16

May 28 2014

MerelyGifted
20:35
9147 6861 700
LIME CRIME Vegan Candyfuture Opaque Lipstick in No She Didn’t.
Reposted bymakeupmuertomolotovcupcakekfiati

May 27 2014

08:24
08:20
2830 a4f4 700

GIF Animation of von Mises stress of gears.

ANSYS.net

Reposted byMrCoffegifluvwieslawwonszflanelchowmeinunicornsofdoomWekszaltysekkrybusjv6verdantforcecaptainjackharknessjabolmaxgruetzegrubygromoedhellinzynierwrtlbrnftthomerthbiosalexfreak50MinorThreatpmgnutzIgnitionpi-nutsmorkovkaOhJohnnynibblerPewPowlambdacheathaavgpFreXxXRekrut-Kfiffeyshallowmetafnordcygenb0ckkernrotryzyksydnor
08:14
2832 32b3 700

GIF Animation of von Mises stress.

ANSYS.net

Reposted byMrCoffeverdantforcejabolmaxgifluvpi-nuts
08:04
07:50

March 28 2014

03:05

December 31 2013

19:32
7398 8ca1
Reposted bymisseccentricsmoke11

December 25 2013

07:12
07:06
07:02
06:51
06:41
06:31
06:21
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