Multi-response mixture design applied for the formulation of a textile green camouflage ink with reproduction of a leaf green

This study establishes a proportioning model of green camouflage ink for textile screen printing to reproduce a leaf green using four high-performance inorganic pigment pastes: cobalt blue, chrome oxide green, chrome yellow, and iron red. In order to study the influence of four-color paste formulations on the camouflage performance of ink, a multi-response quadratic Scheffe mathematical model was established, and a total of 20 runs of color paste formulations were designed. Blending mixed color paste with water-based pure acrylic lotion, drying retarder, and thickener, the ink was then printed to the surface of the khaki camouflage decorative textile through screen printing. The spectral reflectance of the ink film was measured at 380 similar to 1100 nm, and the response values were calculated. The regression model of each response was fitted using the least squares method. The model and verification experiments show that when the color paste formulation is 45.08% cobalt blue, 10.00% chrome green, 40.53% chrome yellow, and 4.39% iron red, the green camouflage ink match the leaf green well. The color difference between the green camouflage ink and the leaf green is less than 3, the reflectance ratio in the near-infrared and infrared bands is not less than 5, and the near-infrared brightness contrast with the leaf green is not more than 0.2. In addition, the green camouflage ink's reflectivity is located in the leaf green hyperspectral channel.