LOTSORB B014 High contrast powder blocks the dark red color, making it appear even redder

Dark red is the low-purity stray light reflected from red objects. High-contrast color powder absorbs/blocks the dark red light, removing the "dark interference" that dilutes the purity of red. The reflected light is now only high-purity bright red light. The human eye perceives a more saturated and brighter red, which is "more red in color".

This principle is essentially consistent with the concept of "absorbing yellow light makes green greener" and "absorbing cyan light makes blue bluer" - both involve enhancing the purity of the target light by "removing the stray light from the target color", thereby enhancing visual contrast and vividness.

The color of an object is determined by "reflected light". When we see an object as "red", it essentially means that under the influence of incident light (such as sunlight or white light), the object preferentially reflects light in the red wavelength band (typically 620-680nm), while absorbing light in other wavelength bands (such as green and blue).

However, in reality, the "red light" reflected by most red objects is not absolutely pure. Apart from the visually vibrant "true red light" (e.g., with a wavelength of 640-660nm, high brightness, and high saturation), it may also contain a small amount of dark red light (with a longer wavelength, approximately 660-700nm, low brightness, low saturation, visually darker and grayish), or trace amounts of other stray light (such as orange-red). These stray lights can "dilute" the purity of the true red light, making the object's red color appear less vibrant and darker.

II. Key: Dark red is a "stray light" within the red spectrum, which reduces the saturation of red.

Although dark red also falls within the "red wavelength band", it differs significantly from the "bright red" we seek.

Optical characteristics:      Bright red light (target light)       Dark red (stray light)

Wavelength range:         640-660nm                    660-700nm (longer)

 Visual brightness:         Higher                         Lower (darker)

 Color saturation:          High (pure, bright)               Low (grayish, darker)

 Impact on red:       Enhances the visual perception of "red"    Dilutes the purity of "red", appearing grayish and dark.

III. The role of high-contrast color powder: Absorbing dark red and "purifying" the reflected red light.

The core function of high-contrast color powder is to precisely filter light wavelengths: it does not absorb the "bright red light" we need, but can actively absorb or block out those "dark red stray lights". This process is equivalent to completing a "red light purification".

Removing stray light interference: after the powder absorbs dark red, the "dark tone components" in the reflected light, which originally accounted for a small proportion but affected the visual perception, are removed, eliminating the "grayish feeling" and diluting the red color;

Highlighting the target light: the remaining reflected light is almost entirely "bright red light" (640-660nm), which significantly increases its proportion in the reflected light and significantly enhances its purity;

Human visual perception enhancement: the human eye is more sensitive to "high purity, high brightness" light - when the reflected light is entirely pure red light, the "red signal" received by the brain is stronger and more singular, ultimately leading to a more vivid and saturated color perception, which is what we refer to as "more red".