How can films be re-released later in a higher resolution?

Question

I can understand how movies can be released at higher resolutions a short time after original release, like a couple years. But I’ve seen some movies get released a whole decade later in *MUCH* higher quality than the original release. Like, how does something released in the 90’s or 2000’s get a 4k UltraHD release now?

In: Technology

Answer 1

Because they were recorded on film and film doesn’t really have a resolution. Film is analog. You can always go back to the original film to get a high resolution version.