BS ISO 20463:2018 pdf free.Rubber and rubber products一Determination of combustion energy and carbon dioxide emission from biobased and non-biobased materials. Note I to entry: The biobased carbon dioxide emission is expressed in g/g, or emitted carbon dioxide amount (g) per sample mass (g). gross calorific value absolute value of the specific energy of combustion, for unit mass of rubber or rubber-product sample burned in oxygen in a calorimetric bomb under specified conditions. Note 1 to entry: The products of combustion are assumed to consist of gaseous oxygen, nitrogen, carbon dioxide and sulfur dioxide, of liquid water (in equilibrium with its vapour) saturated with carbon dioxide under the conditions of the bomb reaction, and of solid ash, all at the reference temperature. Note 2 to entry: The gross caloriflc value is expressed in 11g. net calorific value absolute value of the specific energy of combustion, for unit mass of rubber or rubber-product sample burned in oxygen in a calorimetric bomb under such conditions that all the water of the reaction products remains as water vapour, the other products being as for the gross calorific value (j), all at the reference temperature. Note I to entry: The net calorific value is expressed…