What are oil, polishing agent and ultraviolet polishing agent?

Polishing 1- Print the bright paste again with an ordinary printing machine (another is matte oil), with a general thickness and a general brightness.

Polishing 2-Re-printing water-based varnish with a common printing machine (usually used on a 5-color machine). The thickness is very thin and the brightness is ok.

Oiling-After the printed matter is printed, oil the oiler (the one with drying channel), and the oil comes out thick and bright.

UV-after the printed matter is printed, put it on a UV machine for UV oil. There must be a drying channel, otherwise it won't work. Very thick, taller than paper, with outstanding hand feeling and bright.

Polishing.-I don't know

Calendering-the product after oil is reused at high temperature; High pressure; Press the wheel down once, it's very, very bright.