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Red Chinese glass beads - questions
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Posted by: beadiste Post Reply
02/04/2018, 13:38:04

Still sorting through my Chinese glass beads from the early 1990s, all purchased from Hands of the Hills, who got them in northern Thailand.
The Dunnings believed these beads to be products from the 1950s-80s, in contrast to the dark cobalt beads with worn patina and ends, which they thought could be a couple of generations old, perhaps dating to the Qing dynasty [court necklace beads?]

The beads on short strands in the middle display wear on the ends.
Colors vary from a dusty currant red to bright scarlet.

The beads on the left, in a necklace I strung in the early 1990s (which has always reminded me of black olives and cherry tomatoes, possibly why it never sold), show only very minimal wear around the holes, but are more carefully made than the bright red strand on the right.

I'd really like to know what colors of red are in that beaded shop sign from the late 1930s in the Japanese museum. I.e., is there any evidence at all that the Boshan glassworks made bright red cadmium/selenium beads before World War II?

The red beads on the wicker sewing baskets from the 1920s are a very different color - sort of a bubbly dark tourmaline red/pink.

SAM_8450_(2).JPG (253.1 KB)  SAM_8453_(2).JPG (192.5 KB)  


Modified by beadiste at Mon, Feb 05, 2018, 14:45:52

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Copper ruby vs Selenium/Cadmium and "striking"
Re: Red Chinese glass beads - questions -- beadiste Post Reply Edit Forum Where am I?
Posted by: beadiste Post Reply
02/04/2018, 14:37:08

Re-reading Rick Sprague's Beads:Journal... article 1990 Vol.2, found this:

"The demonstration was of the making of a small, teardrop-shaped ear bob. This item is made without a wire insert from a clear-glass rod that turns ruby red when heated."

Am I mistaken in thinking that lead glass with copper [later: gold glass also strikes to ruby] is what requires reheating to "strike" the color? This is not necessary with selenium/cadmium ruby glass?

Could the duskier red beads on the left in my photos be copper red?



Modified by beadiste at Sun, Feb 04, 2018, 14:38:53

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in pottery...
Re: Copper ruby vs Selenium/Cadmium and "striking" -- beadiste Post Reply Edit Forum Where am I?
Posted by: birdi Post Reply
02/04/2018, 18:58:09

In pottery glazes, cadmium and selenium are used to create red in oxidation environments, which are the opposite of 'striking'. Striking is similar to reduction firing, where the firing environment is starved of oxygen to achieve the red color. Cadmium and selenium are used in low-fire glazes and are more reliable colors than copper reds. The shades of color look very different however.

I make copper red glazes by using glazes that include copper carbonate and tin oxide and fired in a reducing atmosphere. Copper reds often are a muddy shade.

In general, reduction firings starve the kiln (or glass furnace) of oxygen. The heated fuels combine with oxygen in the glaze or glass batch, changing the glaze color as oxygen leaves and the minerals are converted to different molecules.

I can't really comment on the use of gold to create red glass.



Modified by birdi at Sun, Feb 04, 2018, 19:01:13

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Re-reading Rick Sprague's 1990 article - bead curtains?
Re: Red Chinese glass beads - questions -- beadiste Post Reply Edit Forum Where am I?
Posted by: beadiste Post Reply
02/05/2018, 14:43:19

During Rick's 1986 tour an engineer at the Beijing Glass Ware Factory in Chongwen district commented that they had stopped making glass beads:

"She explained that the factory no longer makes beads because plastic beads have replaced the glass ones in brilliance and cost."

Recalling Valerie Hector's article about Chinese bead curtains, could this have been the major Chinese market for the hand-wound glass beads?

Everyone talks about the beads exported throughout Southeast Asia, but it seems likelier that the Chinese factory was making beads because it had ready buyers closer to hand for its products.



Modified by beadiste at Mon, Feb 05, 2018, 14:47:06

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Don't Forget Paddy
Re: Re-reading Rick Sprague's 1990 article - bead curtains? -- beadiste Post Reply Edit Forum Where am I?
Posted by: Beadman Post Reply
02/07/2018, 10:00:46

Paddy Kan (Leekan Beads in NYC with partner Annie Lee) also went to Boshan, visited factories, and bought beads—and composed articles for Ornament with Robert Liu.

In 1987, when The History of Beads (1st edition) was released, I was in NYC with David Ebbinghouse, and Walt Seifried to attend the festivities, and shop at local companies. We went to Leekan—and I bought quite a few new Chinese millefiori beads—they being primarily yellow or black, with some remarkably large red beads (with very sparse millefiori).

I compared my new black beads with old (bought in Hong Kong) black beads—and they were identical, apart from the surface wear of the old beads. JDA.



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I'd really like to read Paddy
Re: Don't Forget Paddy -- Beadman Post Reply Edit Forum Where am I?
Posted by: beadiste Post Reply
02/07/2018, 10:31:37



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Re: I'd really like to read Paddy's article, but
Re: I'd really like to read Paddy -- beadiste Post Reply Edit Forum Where am I?
Posted by: beadiste Post Reply
02/07/2018, 10:33:01

...I don't have that back issue of Ornament (Vol.8: 2, p32-40).

Did you ever publish your 2004 presentation at Bead Expo?



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Back issue - expensive...
Re: Re: I'd really like to read Paddy's article, but -- beadiste Post Reply Edit Forum Where am I?
Posted by: jatatoo Post Reply
02/07/2018, 11:23:13

Actually No. 2-4 it looks like.

https://www.bookfinder.com/search/?author=&title=Ornament+Vol.8%3A+2&lang=en&isbn=&new_used=*&destination=us¤cy=USD&mode=basic&st=sr&ac=qr



Modified by jatatoo at Wed, Feb 07, 2018, 11:37:17

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