"Jet Stream is a very very stiff glass. This has both benefits and drawbacks in needing a lot more heat to work it if working large as I did. The stiffness made it easier for me to handshape the base, and it stayed put not moving or distorting when working on the sculptural bit on the top. The down side of the stiffness is that working is slower and I found it a lot harder to firepolish any chill marks. If I used a lot of heat to work faster, any scratches on the rod [as I had, and quite a few] will bubble and scum and will leave it in your work without regular 'junking' at the end of the mandrel. This issue was my main disappointment with it and I had to work a lot cooler than usual to counteract it."
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Claire Morris
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