Post-processing feasibility of composite-layer 3D printed beef.

Area of Science:

• Food Science and Technology
• Materials Science
• Additive Manufacturing

Background:

• 3D printing of food products offers customization and novel textures.
• Understanding post-processing changes is crucial for product development.
• Lean meat-lard composites present unique challenges for 3D printing and cooking.

Purpose of the Study:

• To investigate the impact of infill density and fat content on the physical and textural properties of 3D printed meat products after sous-vide cooking.
• To analyze post-processing changes including cooking loss, shrinkage, and texture attributes.
• To determine the interactive effects of infill density and fat content.

Main Methods:

• 3D printing of lean meat-lard composite structures with varying infill densities (50%, 75%, 100%) and fat content (0-3 layers).
• Sous-vide cooking of the 3D printed samples.
• Measurement of physical properties: cooking loss, shrinkage, moisture retention, fat retention.
• Texture analysis: hardness, chewiness, and cohesiveness.

Main Results:

• 3D printed meat products maintained structural integrity post-cooking.
• Infill density positively correlated with moisture retention, hardness, and chewiness, and negatively with shrinkage and cohesiveness.
• Fat content positively correlated with cooking loss, shrinkage, and cohesiveness, and negatively with fat/moisture retention, hardness, and chewiness.
• Significant interactions between infill density and fat content affected most properties, except fat retention.

Conclusions:

• Both infill density and fat content significantly influence the post-processing characteristics of 3D printed meat products.
• Optimizing these parameters is key to achieving desired texture and minimizing physical changes during cooking.
• The findings provide valuable insights for developing palatable and structurally sound 3D printed meat alternatives.