by illium » Jan 12th, '06, 11:58
One of the most important factors of brewing tea is the temperature of the water. When brewing with a gaiwan, or any kind of container, the material of the container is quite significant to it's ability to retain the heat of the water.
You might be familiar with the idea of pre-heating your teapot or cup with hot water before hand. This is a good and avisable practice for all types of tea preparation and vessels.
But another more subtle issue is the material the teapot/gaiwan is made of, and how thick or thin it is.
For example - lets say you have a ceramic gaiwan made very thin. That means that it will heat up very quickly, but that it will cool off very quickly and lose heat very easily, thus causing the water inside to cool off rapidly. You could pre-heat it easily, but it would lose that heat quickly. A thicker gaiwan would retain the heat longer, but needs more pre-heat time.
Also, it depends on the kind of tea you are brewing. A white/green tea is better brewed at a lower temperature, and is served well by a temperature curve that drops off faster (because the bitterness comes out at the end of the brewing time), so a thin walled gaiwan might be more appropriate. An oolong, like the DongDing you mentioned, likes hotter starting water temperature and a longer heat retention curve, and would be better in a thicker-walled gaiwan, or the traditional pre-heated YiXing pot.
Another major issue that you might consider is the water you're using. Since the end product of the tea you drink is 99% water, it makes a huge impact. The difference between the flavour in Taiwan versus your home could be as simple as the difference in the local water.
I live in Portland, Oregon, and we're blessed to have a local water supply that is primarily from a massive glacial water shed. I recently travelled to my mother's home in St. Louis, Missouri, and brewed up some tea for her while I was there. I was shocked at the difference in flavour (to the negative), due to the harsh river water that St. Louis lives on.
So, you might consider using a bottled natural spring water for your tea. That is considered the best option, as it will provide a consistent flavour. Another option would be to use a filter jug and filter your tap water. That will remove mose of the heavy metal deposits in the water, and clear up the flavour a lot.
Hope that helps,
Troy