The amount of residue when a sample of paper is burned under controlled conditions so that all ignitable matter is removed.
the inorganic residue that remains after coal is burned; expressed as a percentage of the weight of the coal
The solid residue remaining after a reinforcing substance has been incinerated (or strongly heated).
The percent by weight of residue left after combustion of an oil sample (ASTM Method D 482). Determined by burning the oil and weighing the residue.
Residue left after complete combustion of paper at high temperature, generally expressed as a percentage of the original test sample and represents filler content in the paper
The quantity of anorganic substances in a paper stock that will be converted to ash when burned.