The 60-degree mirror-like finish does not exceed 5 gloss units.
Gloss is an optical property of an object's appearance. Smooth-surfaced materials that are illuminated by visible light will produce a directional reflection to the opposite direction, known as specular reflection. This results in the material surface having a glossy appearance, which is referred to as specular gloss. The degree of its reflective ability is called the gloss level.
The size of the coated mirror's luster is determined by measuring the ratio of the reflected light flux to the incident light flux on the sample surface. Typically, a 60° incident angle is used for measurement. The non-glossy surface setting of "优*" is set to 0. A glossmeter can be used to measure the luster of the product.
The color difference is no greater than 3 L*a*b* units.
Color representation, or color modes, come in various types, such as RGB, XYZ, and L*a*b* modes. These modes are all interconvertible.
RGB color mode is an industrial color standard that achieves a wide variety of colors by varying and overlaying the red (R), green (G), and blue (B) color channels. RGB represents the colors of the three channels: red, green, and blue. This standard encompasses almost all colors that the human eye can perceive and is one of the most widely used color systems. As for our computers, most displays currently use the RGB color standard. RGB is designed based on the principle of color emission. Simply put, its color mixing method is like having three lights—red, green, and blue—and when their light overlaps, colors blend, while brightness equals the sum of their individual brightnesses, becoming brighter with increased mixing.
The XYZ color model is simply a representation of the RGB color model using mathematical methods. X, Y, and Z are known as the three stimulation values. X and Z only represent chroma and not brightness. Luminance is directly proportional to the stimulation value Y. This is consistent with the contrast formula for visible light luminance.
The L*a*b* color model is an improved version of the XYZ color model. Its L* (lightness), a* (green to red), and b* (blue to yellow) represent numerous values. Compared to XYZ, the L*a*b* color model is more suitable for human perception of color. Using this model, one can independently adjust the color's brightness L*, grayscale, and saturation a*b*.
In the research and production of camouflage nets, the L*a*b* and XYZ color modes are generally applied, with the values within these modes obtainable through sample testing. If the standard color of GJB1082-91 "Color for Camouflage Nets" is used for the contrasting color, the corresponding values can be found through the standard.
ΔE*ab Calculation
⊿E*ab=﹝﹙⊿L*﹚2+﹙⊿a*﹚2+﹙⊿b*﹚2﹞1/2
In the formula: ΔL*, Δa*, Δb*—The differences between the color of the camouflage net sample and its corresponding standard coordinates L*, a*, b*.
⊿E*ab ≤ 3, meeting the standard requirements.
Three, the contrast in visible light brightness does not exceed 0.1.
Visible Light Luminance Contrast KV Calculation: KV = |Ys - Yr| / Yr
Equation: Ys — Sample color's stimulation value Y in the XYZ chromaticity system; Yr — Standard color's stimulation value Y in the XYZ chromaticity system.
KV is less than or equal to 0.1, which meets the standard requirements.
