IEC TS 61244-1:2014, which is a technical specification, reviews experimental techniques to quantitatively monitor the effects when oxygen is present during ageing of polymers in various environments including temperature, radiation or ultraviolet. This edition includes the following significant technical changes with respect to the previous edition:
a) numerical simulation of DLO is much improved,
b) geometry of samples has been expanded from only the case of the infinite plane to the cylindrical and the spherical cases.