Mix 1 teaspoon turmeric powder with 2 tablespoons rubbing alcohol or warm water
Stir until a smooth paste or solution forms
Dip white filter paper, coffee filter, or blotting paper into the mixture
Remove the paper and let excess liquid drip off
Lay the paper flat to dry completely
Cut the dried paper into strips
Store the strips in a dry container
Test a liquid by dipping a strip into it
Observe a change to reddish-brown in basic solutions
Compare the color change with untreated paper for reference