Why does blanching make leafy vegetables easier to pack into cans?

Blanching makes leafy vegetables easier to pack into cans primarily because it wilts the plant tissues. By rendering the vegetables limp, this thermal process reduces their volume, allowing them to be packed more efficiently into containers.12

In addition to facilitating packing, blanching serves several other critical functions in vegetable processing:

• Enzyme Inactivation: It stops the activity of natural enzymes that would otherwise lead to undesirable changes in color, flavor, and aroma.21
• Microbial Reduction: It helps lower the number of microorganisms present on the produce.21
• Gas Removal: It removes entrapped gases from the vegetable tissues.1
• Flavor Improvement: For certain vegetables, such as spinach and collards, the process helps remove harsh flavors.2

Following the blanching process, vegetables must undergo rapid cooling to ensure optimal quality retention before further processing.2