Spall

From Wiki


  • A small fragment of a fragile art work with jagged edges.
  • “Small fragments of glass, pottery, stone or other brittle object with a sharp or ragged edge (AAT 2004).”
  • “An irregular sized chip or fragment from a ceramic, masonry, stone, or ore surface.’ ‘Spalling, or breaking up, of the surfaces are often induced by freeze-thaw action, corrosion, or salt formation (MFA Boston 2013).”
  • “Defect in repeatedly fired clay materials where outer layers shrink and peel away—most often occurs in kiln hot-face when refractories are repeatedly fired beyond their rated temperature (Ceramic Arts Daily 2014).”
spalling on low-fired ceramic leading to loss of surface

Related Terms

Synonyms in English

flake/flaking (Note: refer to flaking definition.)

"exfoliation and scaling" (MFA Boston 2013)


Translation (Homepage n.d.)

Language Translation
Arabic شظية
English spall
French Le Morceau
German splitt
Italian frammento
Portuguese Lascar
Russian обломок
Spanish fragmento

Discussion

In climates where stone or ceramic items rest outside and are exposed to the elements on a regular basis (i.e. buildings that have gargoyles on their roofs or ceramic pots for plants), they are more at risk for spalling. “Freeze-thaw cycles can result in spalling, or delamination of the stone surface, eventually leaving no more than a shapeless mass in a relatively short amount of time (Encyclopedia Britannica Online 2015).”

This can also happen with ceramics where there is a “defect in repeatedly fired clay materials where outer layers shrink and peel away—most often occurs in kiln hot-face when refractories are repeatedly fired beyond their rated temperature (Ceramic Arts Daily 2014).”

References

Encyclopedia Britannica Online, s. v. "art conservation and restoration", accessed March 23, 2015, http://www.britannica.com/EBchecked/topic/36477/art-conservation-and-restoration/225802/Stone-sculpture.

Homepage. Google Translate. Accessed March 19, 2015. https://translate.google.com/?hl=en.

MFA Boston. "Spall." CAMEO. Last modified July 24, 2013. Accessed March 22, 2015. http://cameo.mfa.org/wiki/Spall.

Ovoid jar decorated with scale pattern in red. Photograph. MFA Boston. April 20, 2013. Accessed March 22, 2015. http://cameo.mfa.org/images/thumb/8/81/Image3_802414.jpg/180px-Image3_802414.jpg

“Spall.” In Art & Architecture Thesaurus. J. Paul Getty Trust, 2004. Accessed March 22, 2015. http://www.getty.edu/vow/AATFullDisplay?find=spall&logic=AND&note=&english=N&prev_page=1&subjectid=300343517

"Spalling." In Glossary. Ceramic Arts Daily, 2014. Last modified 2007-2014. Accessed March 22, 2015. http://ceramicartsdaily.org/glossary/spalling/.  

CPaine (talk) 22:22, 28 March 2015 (CDT) *Note: photo added before the rest of my additions
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