Crushed Pottery Temper Ceramics

Foreign material sand plant fibers grit shell crushed rock broken pottery added to clay for potterymaking to improve its firing qualities and prevent a vessel from cracking during the drying process.

Crushed pottery temper ceramics. Temper reduces plasticity which would cause shrinkage or cracking upon drying and firing. Some clays are self tempered that is naturally contain enough mica sand or sponge spicules that they do not require additional tempering. Substance in clay that modifies its properties when wet or dry as well as during and after firing rice 1987 407 mixing of additives including other clays with clay to produce a body for pottery making rye 1976 109. It is often characterized by the adoption and use of riverine or more rarely marine shell tempering agents in the clay paste shell tempering is one of the hallmarks of mississippian cultural practices.

Pure kaolin clay does not require tempering. In north america the use of crushed mussel shell as temper first began millennia ago but increased dramatically at ca. Temper can be bought found or made of many different possible materials. Peacock 1968 declared that group a malvernian rock fabric was a tempered one.

Grog or crushed potsherd temper variable pottery series cross section of grog tempered sherd thin section of grog tempered sherd width of image 2 5mm. Some clays used to make pottery do not require the addition of tempers. I have made temper from aquarium gravel that i crushed down to an appropriate size crushed shells old broken pottery that i have pulverized down into little pieces sometimes even coarse sand. Although most texas archaeologists have correctly identified the crushed white inclusions found in these ceramics as bone positive identification of the temper through the use of histology has not been attempted.

Aboriginal pottery tempered with bone has been found at many prehistoric protohistoric and historic sites in south and central texas. All signs point to this being absolutely correct. Mississippian culture pottery is the ceramic tradition of the mississippian culture 800 to 1600 ce found as artifacts in archaeological sites in the american midwest and southeast. Knight marsden and carney 2003 have also demonstrated that the granodiorite found in some iron age pottery made in leicestershire was crushed and added as temper.

Ang 6930 archaeological ceramics k.