In the afternoon at the office, tearing open a drip bag instantly fills the whole workstation with a rich aroma. Many friends who are new to drip bags look at the filter bag full of coffee grounds after drinking and always feel that brewing it only once is a bit of a waste, so they casually pour another large cup of hot water to re-brew. However, the re-brewed cup often tastes clearly watery, with a dry, astringent feeling rising at the back of the tongue. To drink comfortably, the key is understanding coffee extraction and strength.

After coffee beans are ground into powder, the process in which hot water passes through the coffee bed and brings out flavor is extraction. In roasted coffee beans, about 30% of the substances can be dissolved by water. Among them, the high-quality floral and fruity aromas, bright fruit acidity and caramel sweetness dissolve first when hot water first contacts the coffee bed during the initial brew. A drip bag only needs to be brewed once; what remains for the later stage is basically the rough bitterness brought by lignin, and re-brewing only brings off-flavors into the cup.

The reason many people cannot resist re-brewing is often that they feel the coffee in the cup is too strong and want to add more water to dilute it. In fact, whether coffee tastes strong or weak is determined by strength, while whether the flavor is pleasant depends on the extraction yield. Feeling that coffee is on the strong side is because the proportion of dissolved solids is relatively high; feeling that coffee is a bit astringent is mostly caused by pouring too much water and leading to over-extraction; if it tastes weak and flavorless, then it is excessive dilution by water or under-extraction.

A drip bag is essentially a portable version of pour-over. When we make a standard pour-over at home, we usually follow 15g of grounds, a 1:15 coffee-to-water ratio (225ml water), first bloom with 30ml water for 30 seconds, then pour in stages, keeping the total time at around 2 minutes (between 1:50-2:20). A drip bag works the same way, relying on gravity to let water pass steadily through the coffee bed, thereby bringing out a balanced and clear flavor.

To brew a drip bag so it tastes pleasant, the container and water temperature are crucial. It is recommended to choose a mug with a rim smaller than 9 cm and a height greater than 12 cm, so the filter bag hangs suspended and the coffee liquid does not soak back into the coffee bed and become burnt and bitter. After the water boils, remove the lid and let it sit for two to three minutes. When the water temperature drops to 92 to 95°C, it is most suitable. For a 10g drip bag, pour about thirty to forty grams of hot water for half a cup, and about seventy to eighty grams when filled to about nine-tenths full.

Friends who usually prefer a rich mouthfeel can use a three-stage pour: first pour half the water to moisten the coffee bed and pause for 20 seconds, then pour in two stages until nine-tenths full, with a total water amount of about 150 milliliters, taking one and a half minutes, for a mellow, full-bodied taste. If you prefer a refreshing, juice-like texture, you can add a fourth stage, keeping the total water amount at about 200 milliliters. As long as you master the coffee-to-water ratio, even the same bag of beans can be adjusted to your preferred strength.

When choosing drip bags, you can also choose beans according to the strength you like. Friends who prefer a light, refreshing drink and enjoy rich fruit acidity and floral aromas are well suited to light-roast batches. For example, Qianjie Panama Geisha drip bags have a delicate, elegant oolong tea note on the palate; Qianjie sun-dried Huakui drip bags are full of sweet, juicy berry flavors like guava and strawberry; and Qianjie Yirgacheffe Gudingding drip bags open with fresh jasmine and citrus green tea aromas.

If you love a thick, rich mouthfeel, or are used to drinking coffee with milk, medium-dark roasted beans fit very well. For instance, Qianjie Indonesia Mandheling drip bags carry a unique herbal and steady sandalwood aroma, with quite high body; Qianjie Colombia Huila drip bags give off a rich dark chocolate flavor, smooth and tasty; and Qianjie Jamaica Blue Mountain drip bags show a sweet, balanced nutty and creamy aroma, especially pleasant whether drunk black or brewed strong.

Once you understand the secrets of extraction and strength, you will no longer struggle over whether to re-brew. The charm of a drip bag lies in using just a few pours of hot water to lock in the full terroir essence of the origin. Choose a bag of beans that suits you according to your mood each day, gently extract with the right water temperature and amount, and savor it slowly amid the curling coffee aroma, so you can enjoy a pure, clear cup of specialty coffee in the midst of a busy daily routine.