Tapered coffee filter paper size-which brand of coffee filter paper is good?

Tapered coffee filter paper size-which brand of coffee filter paper is good?

Filter paper is often used in experiments together with instruments such as filter funnel and Brinell funnel. The filter paper needs to be folded into a suitable shape before use. The common folding method is to fold the filter paper into a flower-like shape. The higher the degree of folding of the filter paper, the higher the surface area that can be provided, and the better the filtering effect, but be careful not to cause the filter paper to break due to excessive folding. Put the drainage glass rod on the multi-layer filter paper and apply it evenly to avoid the damage of the filter paper.

Operation process

1. Fold the filter paper in half, fold it twice in a row, and fold it into a 90 °center angle shape.

2. Press the folded filter paper with three layers on one side and one layer on the other side to form a funnel.

3. Put the funnel-shaped filter paper into the funnel, the edge of the filter paper should be lower than the funnel edge, pour some water into the funnel mouth, make the soaked filter paper close to the inner wall of the funnel, and then pour out the rest of the water for use.

4. Place the funnel with filter paper on the funnel frame for filtration (such as the ring of the iron platform), place the beaker or test tube that receives the filtrate under the funnel neck, and place the tip of the funnel neck against the wall of the receiving container.

5. when injecting liquid that needs to be filtered into the funnel, hold the liquid beaker in the right hand and the glass rod in the left hand, and the lower end of the glass rod is close to the lower side of the funnel, so that the cup mouth is close to the glass rod, waiting for the filtered liquid to flow out along the cup mouth, and then along the inclination of the glass rod, the liquid flows into the funnel, and the liquid flow into the funnel, the liquid level can not exceed the height of the filter paper in the funnel.

6. When the liquid passes through the filter paper and flows down the funnel neck, check whether the liquid flows down the wall of the cup and injects it to the bottom of the cup. Otherwise, you should move the beaker or rotate the funnel so that the tip of the funnel is firmly attached to the beaker wall, so that the liquid can flow slowly along the inner wall of the beaker.

Filtration: in the process of using different filter paper, I found that the filtration of different brands of filter paper is different, resulting in differences in coffee soaking time, in order to maintain consistency in the process of making coffee, you should try your best to maintain the standardization of coffee soaking time, so it is important to understand the filterability of filter paper. Chemex filter paper is the most expensive, but the filter water is very strong. It can be used repeatedly. If it is used repeatedly for 3 times, the price can be reduced to 50 cents per page, but taking time to wash is also a problem. If it is not clean, it may also leave the residual flavor of coffee made last time. Coffee fragrance like KONO coffee filter paper drop filter type hand filter paper, as long as it is a conical filter cup. No matter the Hario V60 filter cup or the KONO filter cup can be used, and the KONO filter paper imported from Japan is of medium quality, neither thin nor thick, medium filtration, and ideal fit with the filter cup during water injection.

After dripping the coffee liquid to the bottom of the glass pot, slowly increase the hot water bit by bit, and slowly circle the hand pot into the hot water in a circle the size of a 50-yuan coin. The white foam floats up (coffee lye), so the water injection is repeated after the white foam falls, feeling as if the white foam is breathing up and down. At this time, it is still like putting boiling water on the coffee powder to inject hot water into the hot water when the coffee liquid drips into the glass pot on the third and fourth part of the cup scale, but be careful not to wash the white foam (lye) down to the bottom. When the coffee liquid reaches the cup scale, the dripping cup is removed from the glass pot when the coffee liquid reaches the cup scale.