https://epdwindowfilm.com/why-dichroic-glass-is-so-expensive-and-the-best-alternative/
Seems they made a cheap replacement for the expensive glass dichroic mirror.
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Controlling light waves as they pass through or bounce off of hundreds or thousands of layer interfaces is defined by the refractive index of the adjacent polymers. The larger the difference in refractive indices of adjacent polymer layers, the brighter the reflection off their interface. The...
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Made with PET material, the colour film is made by the superposition of hundreds of layers of polyester film by co-extrusion technology.
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https://resinsupplies.co.za/product/holographic-iridescent-self-adhesive-sheets-2-pack/...
Here is what gives iridescent sequins their iridescence. I melted it, seems to be a thin film of transparent plastic.
Before melting, sequins are iridescent
After melting, the sequin loses its iridescence and looks like a ball of translucent plastic:
There is no mica flakes in it coated with...
Explain
The colour changing film is made of many different layers, laminated together to form a sheer film that changes colour as you move around it. As light reflects at different angles the colours glide through rainbows of colour...
OK, the tapes are iridescent and based on thin film interference. The pearlescent plastic with mica flakes has a more sparkly diffuse reflection like nacre.
My final guess is that the Chinese manufacturers include these pigments to achieve either 2D holographic or pearlescent effect. I am not sure but they could be mixed with molten plastic with a rotating drum so that they disperse evenly in the molten plastic,which is then extruded into foils or...
Grating based holographic images and patterns are widely used in
packaging to catch the eye of the consumer. The characteristic
rainbow-like reflection of light from holographic papers can be
used either by itself or with a print to create interesting
contrasts and optical effects. Holographic...
OK some pearlescent tapes I am using have a thin layer on the surface like soap bubbles that varies in thickness
but other ones I am using have many layers of interference pigment (mica powder coated with titanium dioxide) inside the plastic matrix so they block yellow light or green light...
"The holographic effects are created by metalizing the surface with a thin layer of shiny silver aluminum. The holographic patterns are embossed into the aluminum surface, which forms millions of pixels in microscopic grooves and valleys. This embossed surface diffracts the light into many...