Bringing into balance the 5 key elements for making great tea, is an art that anyone can master with a little practice.
1.Water temperature, 2. Steep ( brewing ) time, 3. Amount of leaf, 4. Quality of water. 5. Quality of the tea.
By way of example, brewing too hot or for too long, depending on the variety of leaf etc, can make it overly bitter with higher than desired levels of tannin or caffeine.
A little trial and error will quickly sort this out
The ideal colour of the sencha beverage is a greenish golden colour. Depending upon the temperature of the water in which it is decocted, the flavour will be different, adding to the appeal of sencha. With relatively more temperate water, it is relatively mellow; with hot water, it is more astringent.Some varieties expand when steeped to resemble leaf vegetable greens in smell, appearance, and taste.