Coffee culture

My First Green Bean Purchase Experience! Details to Pay Attention to When Buying Coffee Beans

Published: 2026-01-27 Author: FrontStreet Coffee
Last Updated: 2026/01/27, Professional coffee knowledge exchange For more coffee bean information Please follow Coffee Workshop (WeChat public account cafe_style) When buying coffee beans Pay attention to defect rate! Defect rate! Defect rate! 1 Mandheling G1, 500g green beans, 140 defective beans, defect rate 29%, this high defect rate batch, the appearance looks quite good, upon careful selection, surprisingly so many defective beans, the more you pick, the more you find

Professional Coffee Knowledge Exchange

For more coffee bean information, please follow Coffee Workshop (WeChat public account: cafe_style)

Pay Attention to Defect Rate When Buying Coffee Beans!

Defect rate! Defect rate! Defect rate!

Mandheling G1 Analysis

1. Mandheling G1, 500g green beans, 140 defective beans, defect rate 29%. This batch of beans with a high defect rate looks decent in appearance, but upon careful selection...

...there were actually so many defective beans. The more I picked, the more I found. Defective beans that don't affect health haven't even been picked out yet. The bean sizes also vary greatly, with both flat beans and round beans, making them difficult to sort.

I picked until I was full of frustration. How terrifying! Is this the green bean supplier's problem? Or are all Mandheling G1 beans like this with such high defect rates?

Guatemala Huehuetenango Analysis

2. Guatemala Huehuetenango, 500g, 48g defective beans, defect rate 9.44%. The defect rate is acceptable, but the color of these beans is the yellowest among the four varieties.

And these aren't natural processed beans. They should be past-season beans. Fortunately, the flavor hasn't developed musty notes yet -_-#.

Kenya AA Analysis

3. Kenya AA, 500g, 40g defective beans, 8% defect rate. Large beans are easy to sort and have low defect rates. Highly recommended!

Ethiopia Sidamo Analysis

4. Ethiopia Sidamo, 500g, 15g defective beans, 3% defect rate. Small beans but low defect rate. Recommended!

Online Purchase Risks

Buying beans online always comes with risks. Please use this as reference.

Important Health Note

The picture above shows defective beans. Black beans, insect-damaged beans, and moldy beans must be removed! Consuming them will definitely affect your health.

FrontStreet Coffee: A roastery in Guangzhou with a small shop but diverse bean varieties. You can find various famous and lesser-known beans, and they also provide online store services. https://shop104210103.taobao.com

Important Notice :

前街咖啡 FrontStreet Coffee has moved to new addredd:

FrontStreet Coffee Address: 315,Donghua East Road,GuangZhou

Tel:020 38364473

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