What is astroplate?

Answer 1

Astroplate is a multi-step coating consisting of a chromate plating for strength and abrasion resistance, followed (usually) by a dye coating, then a final Nickel coating in a Nickel Acetate bath. It is usually applied to aluminum parts like electronic connectors.

Answer 2

Astroplate is a type of photographic plate used in astrophotography to capture images of celestial objects such as stars, galaxies, and nebulae. It is a glass plate coated with a light-sensitive emulsion that records images when exposed to light through a telescope. Astroplates were commonly used in the past before the advent of digital imaging technology.