SI
SI
discoversearch

We've detected that you're using an ad content blocking browser plug-in or feature. Ads provide a critical source of revenue to the continued operation of Silicon Investor.  We ask that you disable ad blocking while on Silicon Investor in the best interests of our community.  If you are not using an ad blocker but are still receiving this message, make sure your browser's tracking protection is set to the 'standard' level.
Pastimes : Don't Ask Rambi
 Public ReplyPrvt ReplyMark as Last ReadFilePrevious 10Next 10PreviousNext  
To: Gauguin who wrote (13939)10/26/1998 5:31:00 PM
From: Jacques Chitte  Read Replies (2) of 71178
 
"blacker than black"
Yeah. Black velvet is a good black reference. Did you know it was really hard to get something really black?
Telescope tubes use a material known as "flock", not quite velvet - the texture is more somewhere between felt and drier lint. The fuzzy surface is very important to the overall blackness - especially in a telescope tube where grazing reflections are important.
The blackest surface I can think of offhand (and I
m no expert) is freshly laid soot.

Did you find a home for Inkspot Jr.?
Report TOU ViolationShare This Post
 Public ReplyPrvt ReplyMark as Last ReadFilePrevious 10Next 10PreviousNext  

HomeMailHotSubjectMarksPeopleMarksKeepersSettings
Terms Of UseContact UsCopyright/IP PolicyPrivacy PolicyAbout UsFAQAdvertise on SI
© 2025 Knight Sac Media.  Data provided by Twelve Data, Alpha Vantage, and CityFALCON News