retardancy

The degree of being retardant

Japanese Meaning

難燃性の度合い、すなわち物質が難燃性を有する程度

The retardancy of the new polymer was critical to meeting the building code's fire-safety requirements.

新しいポリマーの難燃性の程度は、建築基準の防火要件を満たす上で重要だった。

Sense（1）

The degree of being retardant

The methods for evaluating flame and fire retardancy of these materials have been already established.

retardancies

（ plural ）