Why does the cast iron kettle make tea?

Iron kettles are made of pig iron and have pores on the inner wall, so they are also called breathing iron. As we all know, the color of tea will gradually deepen after a long time. Boiling tea in an iron kettle turns black, mainly because of the tannins in the tea leaves.

The iron tannin obtained by oxidation with the iron ions released by the iron kettle at high temperature, and the iron tannin is black, so the tea becomes black.

The principle is similar to how everyone usually cooks tea eggs in an iron pot.

It's also dark, and it's eaten as often, and there's nothing wrong with it, so you don't have to panic and be suspicious. The iron kettle is still very good, which can soften the water quality and replenish ferrous ions.

The style is changeable and beautiful, and it also has cultural heritage and collection value, but the uncoated iron kettle is suitable for boiling water, not for making tea.

After reading it, the question is, what if you want to make tea in an iron kettle?

Method 1: Raise an uncoated iron kettle, the best is to clean water, followed by spring water, use these two kinds of water to raise an iron kettle, the fastest formation of scale. When your iron kettle has a protective film, it's time to make tea.

Method 2: Buy a reliable enamel.

The iron kettle of the inner tank (it must be an enamel inner tank, not an inferior coating on the market). Enamel is the ancient Chinese traditional craft enamel.

You can't use an iron kettle to make tea, because the iron kettle for making tea contains rust, and the tea will turn black when you make tea, which will affect the taste of the tea.

The cast iron kettle will turn black when making tea, mainly because the iron ions in the cast iron kettle react with the alkali in the tea when making tea, making the tea black.

Tea is rich in tea polyphenols, which chemically react with iron and turn black.

Summary. The black ones are tea stains, and the cleaning method is as follows:

Put the juiced lemon zest into a teacup, add some warm water, and wash it off once in a few hours to remove the dirt.

Wipe the inside and outside of the teacup with toothpaste once, and then wipe with a loofah tendon or sponge.

Yellow tea stains on a teacup can be rubbed with a soft cloth dipped in a little salt or alkali powder, and then washed with soapy water.

If it is a metal tea shelf, it will become jet black due to tea dirt, and if it cannot be washed off with a medium-sized detergent, it can be easily removed by soaking it in vinegar or soaking it with bleach.

To remove small pieces of tea stains, you can soak them in a solution of bleach or cleaning powder and leave them overnight to remove them.

The iron kettle boiling water to make tea will turn black.

The black color of the tea boiled in the iron kettle is due to the chemical reaction between the tea and the inner wall of the iron kettle. A substance called iron tannic acid is formed. The black ink we usually use is actually iron tannin.

The tannic acid in the tea will react chemically with iron, so the tea soup will be black, the iron kettle is suitable for boiling water, and the water boiled in the iron kettle can make the tea exude its original taste.

How to deal with this will not be blackened.

I just boil the water to make tea, and then the tea soup will turn black.

The black ones are tea stains, and the cleaning method is as follows: put the juiced lemon peel into the teacup, add some warm water, and wash it off once after a few hours, and the dirt will be removed. Wipe the inside and outside of the teacup with toothpaste once, and then wipe with a loofah tendon or sponge.

Yellow tea stains on a teacup can be rubbed with a soft cloth dipped in a little salt or alkali powder, and then washed with soapy water. If it is a metal tea shelf, it will become jet black due to tea dirt, and if it cannot be washed off with a medium-sized detergent, it can be easily removed by soaking it in vinegar or soaking it with bleach. To remove small pieces of tea stains, you can soak them in a solution of bleach or cleaning powder and leave them overnight to remove them.

Copper is easily oxidized, especially after boiling water at high temperature, the degree of oxidation of copper kettle will be accelerated, and copper oxide will be attached to it and turn black.

There is no coating on the inner wall of the copper kettle, and the copper is easy to oxidize with the air in a humid environment (there is residual water in the copper kettle), and the inner wall of the copper kettle will appear speckled and marked after a long time. You can wipe it clean with white vinegar + salt or lemon slices.

Judging from the blackening of the copper kettle lid, the pot friend must have boiled the tea leaves with the copper kettle, and it has been blackened for a long time. We know that the lid of Japanese iron kettles is generally made of copper, so as to avoid rust on the lid.

Usually, after using the copper kettle, you must use the residual temperature of the electric ceramic stove to control the water in the kettle. This avoids oxidation and rusting on the inner wall of the copper kettle.

As long as the copper kettle is metal, it will decompose a tiny part of the metal substance during the boiling process. However, copper has a higher density, and the amount of decomposition is smaller than that of iron and aluminum, which is better than that of iron and aluminum.

There are still certain benefits to boiling water in a large copper kettle. Boil water in a copper kettle as opposed to other aluminum kettles. Stainless steel kettles and other boiling water are much better. Because although the copper kettle boils water at a certain temperature, even if it precipitates trace amounts of copper. It is good for the human body.

Copper is easy to be oxidized, especially after boiling water at high temperature, the copper kettle oxidizes faster, adheres to copper oxide, becomes black, generally can be wiped and cleaned with oil, when not in use, it is easy to be affected by moisture in the air, green patina occurs, and the surface can be protected by waxing.

As long as it is pure copper, that is, a pot made of copper, it is oxidized to black by high temperature after boiling water, which is normal and harmless to health.

Hello, dear, you can't drink. The iron kettle is made of cast iron, and there are pores on the inner wall, and the color of the tea will gradually deepen after it has been left for a long time. The blackening of tea boiled in an iron kettle is mainly due to the tannin in the tea leaves oxidized with the iron ions released by the iron kettle at a high temperature, and the iron tannin is black, so the tea becomes black.

The principle is usually used to cook tea eggs in an iron pot, which is also black, so the iron kettle is still very good, which can soften the water quality, supplement ferrous ions, and the style is changeable and beautiful, and it also has cultural heritage and collection value, but the uncoated iron kettle is suitable for boiling water, not suitable for boiling tea.

Summary. Let's take a look at the reasons why the tea will be boiled black: most of it is affected by two factors: the tea type or the iron kettle.

Let's take a look at the reasons why the tea will be boiled black: most of it is affected by two factors: the tea type or the iron kettle.

Because the tannic acid in the tea leaves, combined with the iron ions of the iron kettle, iron tannin is produced.

Note that this is not drinkable. In particular, the rusty part will be more obvious, and through the combination with tannic acid, the oxidized rust will be reduced to a black tanning beam with high acid iron slag, and part of the large scale rust will be dissolved. Therefore, it will be cooked with a strange color.

Therefore, when boiling tea, please try to avoid teas with a light degree of fermentation, such as: green tea, high mountain tea, Pu'er new tea, etc. Because the above teas contain high tannins, try to choose teas with a high degree of fermentation or heavy roasting, such as:

Iron Annihilation Liang Guanyin, Taiwanese old tea, aged Pu'er, Fu bricks, etc., should be able to avoid this phenomenon.

If it is not because of the relationship between the tea species, it may be because of the relationship between the iron kettle, sometimes because of the rust in the iron kettle (especially a large amount of rust), so please brush the rust inside the scrub first, and then try to boil to see if the tea soup has any abnormalities, and then the reason why the chaos may affect is the acidified film in the pot, or the enamel part. Of course, not all teas are suitable for boiling, so you need to choose the factors for boiling tea.

If it is not because of the relationship between the tea species, it may be because of the relationship between the iron kettle, sometimes because of the rust in the iron kettle (especially a large amount of rust), so please brush the rust inside the scrub first, and then try to boil to see if the tea soup has any abnormalities, and then the reason why the chaos may affect is the acidified film in the pot, or the enamel part. Of course, not all teas are suitable for boiling, so you need to choose the factors for boiling tea.

The blackening of the iron kettle is mainly because the iron kettle you buy is uncoated, and the iron ion kettle released by the iron kettle reacts with the tannins in the tea leaves, making the tea color black. Therefore, generally speaking, it is recommended that you boil only water in an uncoated iron kettle. You can cook a few dishes and try it.

Simple, the cover does not have heat dissipation holes, look for it, cover the eye, and straight.

Summary. Boil water in an iron pot, the water is in contact with the wall of the pot so that the water contains iron (i.e., soluble iron ions), and use this water to make tea, and the tannins contained in the tea will react with iron to form black iron tannins, so the tea will turn black.

Hello, please wait a moment.

Boil water in an iron pot, the water and the wall of the pot leak to make the water contain iron (i.e., soluble iron ions), use this water to make tea, the tannin substances contained in the tea and iron will form black iron tannins, so the tea will turn black.