Member Discussion Forum

Description

Topics regarding quality of glass, its processing and its application in building. 

looking to buy platinum crucibles

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I am looking to buy 2 platinum crucibles, one 50 ml and one 100 ml capacity. I would appreciate any help in refering companies you bought them from. Also is it better to buy Ptas pure as possible or better with alloying elements like 10% Rh which improves its strenght? Is anybody willing to sell used crucibles? I am gonna use them for glass melting purposes. Thanks in advance,Paul

Spider web cracking of powder between two pieces of glass

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Normally, I sandwich the powders, frits & confetti between two pieces of glass ranging from sizes 10X10 to large pieces. Recently the powder in between the glass at temperatures at above 800C forms spider web cracking. Not the glass, the powder only. It happens severely with the Amber which also colour distorts, and to the opaque white. The cool colours are OK. My problem is, is that reducing the temperature the edges do not fuse properly. Raising the temperature I have fused edges but cracked colour.

Aquarium Glass

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I am making a customised wooden aquarium in the netherlands. and I need advice on how thick the the glass should be and what standard.

There is going to be three pains of glass

pains 1&3 will be
hight 150cm
width 90 cm
this will be siloconed behind 18mm thick wood. the viewing area of the glass through this wooden window is
hight = 138cm
width = 80cm

pain 2 is going to be
hight 76cm
width 100cm

viwing area =
hight = 63 cm
width = 92 cm

the shape of the tank is like an upside down U.