No-one likes general adverts, and ours hadn't been updated for ages, so we're having a clear-out and a change round to make the new ones useful to you. These new adverts bring in a small amount to help pay for the board and keep it free for you to use, so please do use them whenever you can, Let our links help you find great books on glass or a new piece for your collection. Thank you for supporting the Board.

Finding the glass pieces you need for your collection involves keeping an eye on the right searches.
From Akro Agate to Vasart, whatever you collect you'll find a quick easy place to search on glass-seek.com

Author Topic: Black Glass  (Read 5577 times)

0 Members and 1 Guest are viewing this topic.

Offline Ivo

  • Author
  • Members
  • ***
  • Posts: 8178
  • Gender: Male
Black Glass
« Reply #30 on: July 17, 2006, 07:15:38 AM »
Quote from: "Lustrousstone"
And the next question is do we know what colours hyalith? Iron = brown black, manganese = purple black, green black = ? and hyalith =??


Various admixtures such as basalt, according to the Egermann Crystalex book, produced the radiant black colour of the dark and infinite night skies.

Support the Glass Message Board by finding a book via book-seek.com


Offline Adam

  • Glass Professional
  • Members
  • ***
  • Posts: 355
  • Sowerby 1949-56, Davidson 1956-61, Jobling 1961-72
Black Glass
« Reply #31 on: July 17, 2006, 09:41:02 AM »
I'm very suspicious of the 'perfect black' concept.  If any owners just happen to break a piece, try looking through any of the fine slivers.  Better still, get someone to grind down a thin section and see what colour can be seen through it.

Adam D.

Support the Glass Message Board by finding glass through glass-seek.com


Connie

  • Guest
Black Glass
« Reply #32 on: July 17, 2006, 09:52:41 AM »
That is my point exactly, Adam D.

This is becoming rather academic, but ..... :lol:

In simplified terms the color of an object is determined by the interaction of light waves and the individual's eyes who is viewing it.  By definition black is the total absorption/adsorption of light waves.  Therefore if light can penetrate through a piece of glass, then it can not appear black to the human eye.

I did hold up the light to  my black Fenton Big Cookie Jar. It showed a deep purple.  But the body of the jar is too thick for light to penetrate and it appears solid opaque black.  Together resting on the shelf they both appear to be an opaque black just like the other black Fenton pieces I have on my website. They were all made from the same forumation of black glass.

Support the Glass Message Board by finding a book via book-seek.com


 

Look for glass on
 ebay.co.uk 
Look for glass on
 eBay.com (US)

Link to Glass Encyclopedia
Link to Glass Museum


This Website is provided by Angela Bowey, PO Box 113, Paihia 0247, New Zealand