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What can the Crema of Espresso tell us about coffee basics?

What can the Crema of Espresso tell us about coffee basics?

During the roasting process, a large amount of carbon dioxide is produced in the coffee beans, most of which will be emitted during the cooling process, and a few will continue to be kept internally, and these gases will be released when the coffee powder is ground, so coffee must be made as soon as possible after grinding. When hot water strikes coffee powder under Espresso pressure, it will emulsify the insoluble oil of coffee powder and at the same time, it will be supersaturated.

2014-10-28
What is the reason for the roasting of coffee beans?

What is the reason for the roasting of coffee beans?

Many coffee friends see a layer of oil on the coffee beans, but some of them are quite dry. Why? Yingyue sycamore will answer for you below. The oil evenly distributed on the surface of coffee beans is actually not oil, but a kind of water-soluble organic matter that looks like oil. Coffee oil itself contains a lot of coffee aroma components, which can be dissolved in water, so the surface of your brewed coffee and

2016-06-01
Coffee beans oil and freshness of the introduction of coffee basics

Coffee beans oil and freshness of the introduction of coffee basics

When we open a can of coffee beans, we sometimes see coffee beans wrapped in a thin layer of oil. It seems that the oil evenly distributed on the surface of coffee beans is not oil, but a water-soluble organic substance that looks like oil. Coffee oil itself contains a lot of coffee aroma components, can be dissolved in water, so you make good coffee surface and will not float a layer of greasy

2015-10-12
The method of judging Italian Coffee Oil Espresso Color determination

The method of judging Italian Coffee Oil Espresso Color determination

The color of Italian coffee oil can well reflect whether the extraction degree of ESPRESSO is moderate, whether the powder is enough, whether the filling force is in place, whether the water temperature of the coffee machine is correct and whether the beans are fresh and many other factors. The color of Italian coffee oil is preferably golden yellow and slightly brown, and the color of oil is milky white. We generally call it insufficient extraction and prefer to

2015-05-23
How to determine the way to extract Espresso coffee oil is correct?

How to determine the way to extract Espresso coffee oil is correct?

1, the flow rate of Italian concentration: the flow rate directly determines the taste of ESPRESSO, too fast flow rate will make the essence of coffee has not been dissolved into the water, but the water has passed through the coffee powder, resulting in coffee tasteless; too slow flow rate will make coffee essence and dregs all into the water, resulting in coffee with obvious scorching taste or exciting bitter taste. For beginners,

2015-12-02
Method for determining the oil content of Italian coffee Color determination

Method for determining the oil content of Italian coffee Color determination

The color of espresso oil can reflect whether the extraction degree of ESPRESSO is moderate, whether the amount of powder is enough, whether the filling force is in place, whether the water temperature of the coffee machine is correct and whether the beans are fresh, and many other factors. Italian coffee oil color is best golden yellow slightly brown, oil color tends to milky white, we generally call it under extraction, tend to

2015-11-12
Introduction to the oil output and freshness of coffee beans

Introduction to the oil output and freshness of coffee beans

When we open a can of coffee beans, we sometimes see coffee beans wrapped in a thin layer of fat. It seems that the oil evenly distributed on the surface of coffee beans is actually not oil, but a water-soluble organic substance that looks like oil. Coffee oil itself contains a lot of coffee aroma ingredients, which can be dissolved in water, so the surface of your brewed coffee will not be covered with greasy.

2014-12-25
Why do some coffee beans have a shiny surface?

Why do some coffee beans have a shiny surface?

Have you ever seen oily coffee beans? Why do some coffee beans have a shiny surface, while others are dry, comfortable and non-greasy? What is the relationship between the "oil" of coffee beans and the freshness? Should we buy coffee beans with or without oil on the outside? Coffee oil, which is not oil, which is evenly distributed on the surface of coffee beans, is actually not oil, but a kind of water that looks like oil.

2015-09-21
Coffee technology introduction of oil production and freshness of coffee beans

Coffee technology introduction of oil production and freshness of coffee beans

When we open a can of coffee beans, we sometimes see coffee beans wrapped in a thin layer of fat. It seems that the oil evenly distributed on the surface of coffee beans is actually not oil, but a water-soluble organic substance that looks like oil. Coffee oil itself contains a lot of coffee aroma ingredients, which can be dissolved in water, so the surface of your brewed coffee will not be covered with greasy.

2014-09-27
Boutique Coffee Science Why the surface of some coffee beans is oily and bright

Boutique Coffee Science Why the surface of some coffee beans is oily and bright

The oil evenly distributed on the surface of coffee beans is actually not oil, but a kind of water-soluble organic matter that looks like oil. Coffee oil itself contains many aromatic ingredients of coffee, which can be dissolved in water, so the surface of your brewed coffee will not be covered with greasy grease. There are two reasons: oilbeans a stale shallow baked beans b fresh deep baked beans. A) not fresh

2014-12-20
What is Crema-- Coffee Oil

What is Crema-- Coffee Oil

During the roasting process, a large amount of carbon dioxide is produced in the coffee beans, most of which will be emitted during the cooling process, a few will continue to be kept inside, and the grinding will release these gases, so coffee must be made as soon as possible after grinding.

2014-08-22
What can Espresso's Crema tell us?

What can Espresso's Crema tell us?

During the roasting process, a large amount of carbon dioxide will be produced in the coffee beans, most of which will be emitted during the cooling process, and a small amount will continue to be stored inside. These gases will be released when grinding the coffee powder, so it is necessary to make coffee as soon as possible after grinding. When hot water hits the coffee powder under high pressure, it emulsifies the insoluble fats of the coffee powder and at the same time, it dissolves in supersaturation.

2015-07-27
Why is the surface of some coffee beans shiny when roasted?

Why is the surface of some coffee beans shiny when roasted?

The oil evenly distributed on the surface of coffee beans is actually not oil, but a kind of water-soluble organic matter that looks like oil. Coffee oil itself contains many aromatic ingredients of coffee, which can be dissolved in water, so the surface of your brewed coffee will not be covered with greasy grease. There are two reasons: oilbeans a stale shallow baked beans b fresh deep baked beans. A) not new

2014-10-15
Introduction to the oil output and freshness of coffee beans in Daquan

Introduction to the oil output and freshness of coffee beans in Daquan

When we open a can of coffee beans, we sometimes see coffee beans wrapped in a thin layer of fat. It seems that the oil evenly distributed on the surface of coffee beans is actually not oil, but a water-soluble organic substance that looks like oil. Coffee oil itself contains a lot of coffee aroma ingredients, which can be dissolved in water, so the surface of your brewed coffee will not be covered with greasy.

2014-09-16
General knowledge of coffee roasting introduction to the oil yield and freshness of coffee beans

General knowledge of coffee roasting introduction to the oil yield and freshness of coffee beans

When we open a can of coffee beans, we sometimes see coffee beans wrapped in a thin layer of fat. It seems that the oil evenly distributed on the surface of coffee beans is actually not oil, but a water-soluble organic substance that looks like oil. Coffee oil itself contains a lot of coffee aroma ingredients, which can be dissolved in water, so the surface of your brewed coffee will not be covered with greasy.

2014-11-18
Coffee common sense the judging method of Italian coffee oil is determined by color

Coffee common sense the judging method of Italian coffee oil is determined by color

The color of Italian coffee oil can well reflect whether the extraction degree of ESPRESSO is moderate, whether the powder is enough, whether the filling force is in place, whether the water temperature of the coffee machine is correct and whether the beans are fresh and many other factors. The color of Italian coffee oil is preferably golden yellow and slightly brown, and the color of oil is milky white. We generally call it insufficient extraction and prefer to

2014-12-02
Introduction to the production of Italian Coffee: the way to determine the Oil of Espresso (Italian concentrate) Coffee

Introduction to the production of Italian Coffee: the way to determine the Oil of Espresso (Italian concentrate) Coffee

1, the flow rate of Italian concentration: the flow rate directly determines the taste of ESPRESSO, too fast flow rate will make the essence of coffee has not been dissolved into the water, but the water has passed through the coffee powder, resulting in coffee tasteless; too slow flow rate will make coffee essence and dregs all into the water, resulting in coffee with obvious scorching taste or exciting bitter taste. For beginners,

2015-12-19
Why do some coffee beans have a shiny surface, while others are

Why do some coffee beans have a shiny surface, while others are "dry and comfortable" without greasy?

The oil evenly distributed on the surface of coffee beans is actually not oil, but a kind of water-soluble organic matter that looks like oil. Coffee oil itself contains many aromatic ingredients of coffee, which can be dissolved in water, so the surface of your brewed coffee will not be covered with greasy grease. There are two reasons: oilbeans a stale shallow baked beans b fresh deep baked beans. A) not fresh

2014-08-07
The determination method of Italian Coffee Oil flow rate to determine the taste of coffee

The determination method of Italian Coffee Oil flow rate to determine the taste of coffee

The flow rate of Italian coffee directly determines the taste of ESPRESSO, too fast flow rate will make the essence of coffee has not been dissolved into the water, but the water has passed through the coffee powder, resulting in coffee tasteless; too slow flow rate will make the essence and dross of coffee all into the water, resulting in coffee with obvious scorching taste or exciting bitter taste. For beginners, the control of velocity

2014-10-21
Introduction to the taste and flow rate of coffee and the regional treatment method of manor production

Introduction to the taste and flow rate of coffee and the regional treatment method of manor production

The color of the oil had better be golden yellow and slightly brown, and the color of the oil is milky white, which is generally called insufficient extraction, while the preference for dark brown is excessive extraction. Insufficient extraction is generally reflected in the milky white color of oil, which may be due to insufficient powder, light filling force, low water temperature, coarse grinding of coffee powder, insufficient water pressure or coffee beans.

2016-10-24
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