Decades ago, I had got a leaflet from a tea shop in Germany (of which I was a regular customer) explaining how to best make iced tea.
1. Fill several long-drink glasses up to two-thirds with ice cubes.
2. Brew the tea. Use double the amount of tea leaves as you normally would for a given amount of water, but let infuse for only half of the time. (Add sugar to taste.)
3. Pour the hot tea on the ice cubes. The tea will be "flash-frozen" instantly, while part of the ice cubes dissolve.
I tried to make a larger amount at once. A while ago, I had bought this "refrigerator pitcher".
I filled it with a lot of ice cubes. The pitcher holds 2 liters, and I filled it approximately to the 1.5-liter mark. Then I brewed the tea. I filled a paper tea filter with 8 teaspoons of green tea.
This is sencha with extra flavor added. I used earl grey flavor (a small rest) and blood orange flavor.
After I had added water of 80 degrees Celsius, it looked like this:
I let it infuse for one and a half minutes, then poured it on the ice cubes.
Hm. Again, I was not so happy with the color. I tried it. I wasn't that happy with the taste, either.
Possible ways to improve it:
1. Less ice cubes.
2. Distribute the tea leaves evenly among two tea filters, so they have more room to expand in the hot water.
3. Use fresher tea. (The blood-orange flavored sencha was more than a year old, I think.)
To be continued.