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First knowledge of Coffee roasting-- defective beans

Published: 2026-04-06 Author: World Gafei

Last Updated: 2026/04/06, Defective beans have a great influence on the taste of coffee

The first step before baking beans is to pick out all kinds of defective beans, some of which are not easy to identify after baking. At present, there are some high-quality coffee raw beans on the market, which are carefully selected and processed when they leave the factory. The following picture shows the types and causes of defective beans.

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 。