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Forerunner of the great helm. The enclosed helmet covered the entire head, with full protection for the face and somewhat deeper coverage for the sides and back of the head than that found on previous types of helmets. It was developed near the end of the 12th century and was largely superseded by the true great helm by c. 1240. Great helm
Despite the armor being commonly associated with the Romans, the technology behind the lorica segmentata was old by the time it was introduced into the Roman infantry. The Dendra panoply is an example from the 15th century BC of articulated plate defense using a similar technique of overlapping curved plates.
Steel breastplate, or Stalnoi Nagrudnik (Russian: Стальной нагрудник) is a type of body armor similar to a cuirass developed by the Red Army in World War II. The native Cyrillic abbreviation for the vest was "СН", the Cyrillic letters Es and En. It consisted of two pressed steel plates that protected the front torso and groin.
While the term "Gothic" in art history covers the 12th to 15th centuries, Gothic plate armour develops only during 1420–1440s, when the technological development of armour reached the stage where full plate armour (including movable joints) was made, and national styles of "white armour" began to emerge, specifically German ("Gothic") and Italian (Milanese).
Ablative armor is armor which prevents damage through the process of ablation, the removal of material from the surface of an object by vaporization, chipping, or other erosive processes. In contemporary spacecraft, ablative plating is most frequently seen as an ablative heat shield for a vehicle that must enter atmosphere from orbit, such as ...
The Vajra (Sanskrit: वज्र, lit. 'Thunderbolt', IAST: Vajra) is a legendary and ritualistic tool, symbolizing the properties of a diamond (indestructibility) and a thunderbolt (irresistible force).
This causes carbon to diffuse into the surface of the steel. The depth of this high carbon layer depends on the exposure time, but 0.5mm is a typical case depth. Once this has been done the steel must be heated and quenched to harden this higher carbon 'skin'. Below this skin, the steel core will remain soft due to its low carbon content.
Some of the many variations of ermine spots found in heraldry over the centuries Ermine fur, from the robes of Peter I of Serbia. Ermine (/ ˈ ɜːr m ɪ n /) in heraldry is a fur, a type of tincture, consisting of a white background with a pattern of black shapes representing the winter coat of the stoat (a species of weasel with white fur and a black-tipped tail).