Curious Metallics iridescent sheen reflects light to create a shimmer that people cannot take their eye off. Curious Metallics unparalleled quality leads to the finest results for any job in any application. The 80# Text Curious Metallics envelopes can be used in a multitude of applications. Curious Metallics is manufactured by Arjo Wiggins in the UK. Curious Metallics is also Acid Free, Lignin Free, PH Neutral, ECF/PCF, Archival Properties. Curious Metallics Anodised 80# Text Envelopes