- Voids are distinct from pores in having held an inclusion (other than gas) prior to firing
 
	- Voids can be form by vegetable fibre which has been burned out
 
	- Vegetable fibres often include chaff, chopped straw, or dung, and tend to be thin and elongate, with longitudinal striations
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Plant voids - Plane polarised light - Nineveh - Iraq
	
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