So I emailed Grace Edwards - where I generally get my Double Helix - What is this new colour "Aether" supposed to do?
Her response was:
omg - I was sure I included the instructions with the sample. It is clear - the new clear from DH and it's so fabulous.
And here's what Double Helix has to say about it:
Aether is a colorless encasing glass designed for superb workability and enhancement of Double Helix colors, engineered to be resistant to boiling, free from seed bubbles, and handled with the utmost care to ensure freedom from scratches and dust. In other words, it is our "clear."
Well - I can say with all confidence - it is clear, and it doesn't scum, boil, reduce, streak, burn or otherwise suffer from abuse - because I did everything to it to try and get it to change colour.
If and when I get some more - I'll let you know how it is for encasing!
The name, Aether, also "Ether," means "Air." Another clue. Ha!