Why do old beans take hours to boil and still remain hard? It is a biochemical phenomenon known as the "Hard-to-Cook" (HTC) defect. This engineering report analyzes how high temperatures and humidity accelerate the lignification of bean cell walls. We explore how utilizing a specific vacuum packing machine for beans creates a stable micro-environment. Learn how Jialong's legume preservation technology slows down enzymatic activity, allowing producers to deliver a product that cooks faster and tastes creamier.