- All have
- Product management
- News
- Introduction led
- Corporate store
- FAQ
- Enterprise Video
- Enterprise map
BLOG
Focus on hot topics, real-time dynamics
Onion drying machine color control
2026-05-18
Onion drying machine color control
The ideal color for drying machine onions is milky white to light yellow, but a slight mistake can turn them brown or even dark brown, greatly reducing their appearance. Table color reason solution: Milk white (optimal), low-temperature slow drying machine with proper color protection at 55-60 ℃, drying machine immediately after blanching, light yellow (acceptable), slight Maillard reaction control temperature not exceeding 65 ℃, shorten drying machine time, brown (temperature difference), reduce temperature if the temperature is too high or the time is too long, increase exhaust volume, dark brown (waste), caramelization reaction. Adjust the process immediately and check the temperature sensor. Key control points: rapid cooling must be achieved after blanching: rinse with ice water or cold water until the center temperature is below 25 ℃, otherwise residual heat will continue to catalyze browning. Color protection solution: Adding 0.1-0.2% citric acid to blanching water can inhibit polyphenol oxidase and maintain color. Avoid light and dry: UV rays can accelerate the degradation of pigments in onions, so the interior of the dryer should avoid direct sunlight.
PREVIOUS:
Contact Us
E-mail:
sales@syguanfeng.com
Tel:
+86 15088506234
Address:
South Industrial Park of Dongguan, Shangyu District, Shaoxing City,Zhejiang Province,China.
GUANFENG, your customization experts!
GUANFENG FOOD MACHINERY - leading supplier of integrated food processing solutions
Copyright© 2024 ZHEJIANG GUANFENG FOOD MACHINERY CO.,LTD.