Yes. I used the Cinestill CS41 color developing kit, which is for color negative films. The Velvia films are (positive) slide. You get somewhat unpredictable color shifts, generally increased contrast. The age of the films added to the unpredictability because the emulsions change over time and there may have been some light leaking too.

Velvia is known for its strong colors and I was very impressed with how colorful the films were after all that time. Their longevity is probably why they still cost about $90-100 for a 5 pack of expired 120s.

Here's an example image https://imgur.com/a/nQ0ltav