Free shipping on orders over $199       imaget3joa.png

Order early for pre-holiday delivery. Flinn will be closed December 24th, 2025,
through January 4th, 2026, reopening Monday, January 5th, 2026.
Orders received after 10:30 AM Central Time on Tuesday, December 23rd, 2025,
will ship after we return.  

FLINN
Your Safer Source for Science
PAVO
All-In-One Science Solution
Your Safer Source for Science
;
Address P.O. Box 219 Batavia, IL 60510
Phone 800-452-1261
Fax
Email [email protected]

Indicator Sponge

November 05, 2016
VEL5029

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.

Recommended