Topic: Another question - is yellow glass particularly difficult to make?

[scavo]

That wasn't what I said 

Sorry, correction: not problematic in production.

I also find (without having conducted a real survey) uranium glass is not that uncommon. More common than yellow glass

I always wonder what the attraction was for buyers of uranium glass before the advent of UV bulbs/torches? From what I've read (admittedly online articles not books), the point of UV was to colour the glass not make it glow.

[dorian_graye]

I've wondered that question too.  I love yellow, just like you.  It really adds "pop" to a room.  I've had a certain piece that I just love, but I still haven't come across anything like it.  Here is a link to the vase I placed on the message board:

http://www.glassmessages.com/index.php/topic,30771.0.html

[Lustrousstone]

Uranium glass is extremely common. It was orginally used because on its own it gives a rich, vibrant yellow (annagelb) or a rich and vibrant green (anngrun) depending on the oxidation state of the uranium. The UV in daylight really adds vibrancy to the colours, as you can see when you compare the same item in the "same" colour with and without uranium. This was probably a real selling point in the darker rooms of the late 19th and early 20th century.

[keith]

 

Uranium glass is extremely common. It was orginally used because on its own it gives a rich, vibrant yellow (annagelb) or a rich and vibrant green (anngrun) depending on the oxidation state of the uranium. The UV in daylight really adds vibrancy to the colours, as you can see when you compare the same item in the "same" colour with and without uranium. This was probably a real selling point in the darker rooms of the late 19th and early 20th century.

....For example,no uv torch here...

[culverwood]

iitalla Kivi prices by colour may give an indication of colour cost or just fashion:
£9.50 – Clear, Grey, Sand, Green, Apple Green, Water Green, Moss Green, Cobalt Blue, Light Blue, Turquoise Blue, Turquoise, Sea Blue
£18 – Sweet Pink, Frosted, Bitter Orange, Water Green,
£29 – Seville Orange, Rio Brown
£35 – Light Lilac, Red, Red Garnet, Yellow, Sweet Pink,
£49 – Rose Olive

[Ohio]

In the U.S. during WWII cerium oxide was used in batch mixes as a substitute for Uranium Oxide to make yellow colored glass. Before that period it was normally the Uranium Oxides/Dioxides used although nowhere near the level of the 2% batch weight that seems to be popular with the Vaseline crowd's definition of Vaseline. If the 2% batch weight was applied as a baseline you'd eliminate the vast majority of U.S. yellow glass, e.g. Cambridge Topaz is only 7/10ths of 1% , Gold Krystol  1/10th of 1% & although its not yellow, the highly reactive Light Emerald is only   2/10ths of  1%. Ken

[scavo]

chipping in with my vagueness again -

I have a factoid bouncing about in my head about yellow being reserved for Emperors in ancient China. I believe this is pertinent to glaze on porcelain and glass.

[paradisetrader]

....is yellow glass particularly difficult to make?

Glass itself is a peculiar and unusual material.
Glass colour chemistry can be an extremely complex, exacting, precise and dangerous science.
That's why making colours now tends to be largely the preserve of a few specialist companies.

All glass colours have specific features. Making the colour is one thing, using it is another.
See: Linear expansion coefficients, Density, Casting Temperature ranges, Annealing temperature, Strain Point

Several colours have peculiarities eg gold ruby double-strike.

Combining colours doubles the complexity and can be dangerous.

Some pale yellow colours develop over time by accident. See "yellowing"
http://www.glassmessages.com/index.php/topic,24790.msg139708.html#msg139708
http://www.glassmessages.com/index.php/topic,515.0.html
and many other topics

Popular taste
Yellow the most popular of colours. It was more popular in USA than Europe (excluding amber and pale amber)
One person I know doesn't like yellow glass as it reminds them of a certain body fluid.
It reminds me of sunshine, lemons, caramel, gold depending on the shade.

Some of my yellow, yellow-ish and part-yellow glass
https://picasaweb.google.com/108649173706197560364/YellowGlass?authkey=Gv1sRgCNPGkaTB7f7jdw#

[chopin-liszt]

 :hug:

Golly gosh, you're busy here today!
Spring in the air? Yellow fever? a bit of both???
(There are some yellow bits missing from your yellow album there though - I know.  :smg: )
lovely to "see" you here. :ghug:

[paradisetrader]

Yes Sue, quite a few not photo'd yet, as they're in the permanent collection and the photo queue is already full as usual.

Correction

Yellow the most popular of colours.

Should read: Yellow has not been the most popular of colours.