Cut strips of paper so that strips do not touch sides of jar when inserted. The strips must be long enough to overlap the rim of the jar.

Fill 100-mL jars 1/8 full with tap water. Use a water bottle to prevent sides of jar from getting wet.

Place 3 dots of each colored ink 1.5 cm from bottom of testing strip. Use a separate strip for each color.
Caution, the dots must be the smallest that you can make them.

Carefully immerse only the lower part of strip in water.

Cap the jar being careful not to create turbulence in the water.

Allow to develop until the water front moves past the original ink dots by about 10 cm.

Record the color changes.

Carefully remove strips and allow to dry. Mount on sheet of paper.

Measure and record lengths of color bands.