BirdForum is the net's largest birding community dedicated to wild birds and birding, and is absolutely FREE!

Register for an account to take part in lively discussions in the forum, post your pictures in the gallery and more.

Reply to thread

Message: <blockquote data-quote="Troubador" data-source="post: 3247430" data-attributes="member: 109211">I used to work in the rubber industry and all of the black rubbers I knew of were coloured black by the inclusion of 'carbon black' in the rubber compound.I don't know if other means of making rubber black are available. None of the black rubbers made by the company I worked for left stains on your hands but maybe this could be possible from cheaply manufactured black rubbers and maybe this could transfer to the Zeiss armour.A few days back I was handling quite a few black rubber o-rings several time but didn't get any marks on my hands afterwards.Have you been handling those Steller's Eiders???Lee</blockquote>