Indicator Paper

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Use grape juice, baking soda, water and vinegar to make acid and base indicator paper! This activity contains a recipe and instructions for the indicator paper. Once made, you can see the indicator paper change color by painting with acids or bases.

Quick Guide

Preparation Time:
Under 5 minutes

Learning Time:
10 to 30 minutes

Estimated Materials Cost:
1 cent - $1 per student

Age Range:
Ages 4 - 11

Resource Types:
Activity, Experiment/Lab Activity


Materials List (per student)

  • 237 mL (1 cup) grape juice
  • 118 mL (1/2 cup) vinegar
  • 237 mL (1 cup) of water
  • 30 mL (2 tbl) baking soda
  • paintbrush
  • 3 plastic cups
  • white construction paper


  • Physical Sciences
    • Chemistry
      • Chemical Reactions
      • Acids and Bases
      • Solutions

Informal Categories

  • Arts and Crafts


To use this activity, learners need to:

  • see
  • see color
  • read
  • touch

Learning styles supported:

  • Involves hands-on or lab activities


This resource is part of:

Access Rights:

  • Free access



  • All rights reserved, Science Museum of Minnesota, 1995

Funding Sources:

  • Unisys
  • Science Learning Network
  • National Science Foundation