aluminum exterior, just one layer wrapped on the inner plastic.
The effect is brighter than the spray image.
Compared with electroplating, the color is dull. Frosting: A layer of frosted texture. Outer spraying of inner bottle: spraying on the outside of the inner bottle has a clear gap between the outer bottle and the outer bottle. When viewed from the side, the spray map area is small. Inner spraying on outer bottle: Ink painting on the inside of the outer bottle looks larger from the outside. The area is small when viewed from the vertical plane. And there is no gap with the inner bottle.
It is actually a film, and you can find the gaps in the bottle through careful observation.
secondary oxidation is performed on the original oxide layer, so as to achieve a pattern with a dull surface covering the glossy surface or a pattern with a glossy surface appearing on the dull surface. Mostly used for logo production.
Toner is added to the raw material during product injection. The process is relatively cheap. Pearl powder can also be added, or cornstarch can be added to make the transparent color of PET become opaque (additional toner can be used for color mixing). The generation of water ripples is related to the amount of pearl powder added.