I would expect warm aqua regia to have some effect on the floor and might have a few fumes. Is it dye in water? An acid proof lab floor would not be affected, but I would still expect some fumes.
This fellow does it and mentions fumes and I do see bubbles in his dissolving.<p><a href="https://www.youtube.com/watch?v=iwnKU89CCdI&ab_channel=PeriodicVideos" rel="nofollow">https://www.youtube.com/watch?v=iwnKU89CCdI&ab_channel=Perio...</a>