Edit: "Semi-Quantatitive"
From top to bottom:
T+0:05
0:15
0:30
0:40
0:40
0:42
I'm calling it 75-80%. The vial was just a touch darker in person than in the pics. Right after the 5 minute pic the cap blew off the vial and knocked it over spilling a small amount of the solution but I don't think it affected the results much, if at all.
Thanks for sharing. :)