The degradation of weather exposed linear low density polyethylene (LLDPE) specimens, with and without pigments, in
Aguascalientes City, Ags. Mexico, during 269 days, was studied. Spectroscopic methods, ultraviolet (UV) spectroscopy
and colorimetry, were used to determine the degradation of the specimens. The material used is not pure since they are
samples of finished product that contain additives such as anti-oxidants, stabilizers, catalysts. One of the samples
contains orange color pigment and the other sample is colorless. The plots describing the absorption bands attributable to
the polymeric material show a similar profile in both samples. The bands attributable to pigment do show a considerable
decrease in absorbance. The results suggest that the orange pigment has been degrading, as it can also be observed in the
color change, while the polymeric material doesn't show any degradation.