M–F, 7:30 AM–5:00 PM CST
Your Safer Source for Science
Published November 05, 2016VEL5029
Indicator Sponge is a colorful illustration of how indicators work. During the demonstration, a red sponge is placed in a red solution and it comes out blue, while the blue sponge turns red when it is placed in a blue solution.
Red, White and Blue
The Red Plague