Changes in colour and gloss were small; colour difference DE was 2 – 4 for Brenntag Canada Inc. and ≤ 2 for Plasticolor Sweden AB and variation in gloss was within 20 percentage points for both colour materials. Chromaticity of the colours was not changed.
Testing of colour stability of polyethylene material used for SeaHow navigation buoys.
Exposure to Xenon-arc light Cycle: 102 min dry, 18 min water spray T(BlackPanel): 63 ± 2°C Duration: 1000h (~6 weeks) Exposure method is based on ASTM D2565 “Standard Practice for Xenon-Arc Exposure of Plastics Intended for Outdoor Applications ” Colour CIELAB1976 and ∆E (colour change), after 0, 333, 667 and 1000 hours exposure Gloss 60° and Residual gloss, after 0, 333, 667 and 1000 h exposure Chromaticity coordinate zone analysis, before and after the exposure