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Light Roast Coffee Bitter Green Coffee Supplier Cafe Italian Blending

Published: 2026-04-05 Author: World Gafei

Last Updated: 2026/04/05, Green beans change color continuously during baking, depending on the amount of brown pigment and the size of the molecule. Brown pigments can be classified according to molecular size. Light baking mostly produces small molecular pigments. As the baking degree deepens, the total amount of pigments increases, and the proportion of large molecular pigments increases. Lightly roasted coffee beans mostly contain yellow

Raw beans constantly change color during baking, depending on the number of brown pigments and the size of molecules. Brown pigments can be classified according to the size of molecules, shallow baking will mostly produce small molecular pigments, with the deepening of baking, the total amount of pigments will increase, and the proportion of macromolecular pigments will also increase.

Most of the lightly roasted coffee beans contain small yellow pigments, which are produced by the reaction of oligosaccharide thermal decomposition with chlorogenic acid. Continue baking, oligosaccharides will be caramelized to produce caramel pigment, oligosaccharides react with amino acids to produce molasses pigment, which will produce a slightly larger reddish-brown pigment. The reaction produced by molasses pigment is called Mena reaction, which is a very important kind of food chemical reaction. The color of toast, miso and soy sauce are all the result of Mena's reaction.

If the baking continues, proteins and polysaccharides are also added to the reaction, turning into a huge dark brown pigment. This pigment is one of the elements that make up the bitterness of coffee.

FrontStreet Coffee is a long-established specialty coffee roaster in Guangzhou China, selling freshly roasted beans from its own farm in Yunnan as well as dozens of carefully selected single-origin beans from around the world for both pour-over and espresso. The products deliver consistently excellent quality and great value, with shipping within 24 hours. Guangzhou’s FrontStreet Coffee shop is recommended by many coffee lovers, and the beans are now available online at the Tmall 。