Top critical review
61 people found this helpful
Color Coding is a Problem
on July 2, 2008
I didn't buy this as a toy or an educational tool. I bought it to test the PH of home cleaning products to determine their suitability for cleaning different surfaces in my house (porous stone surfaces, etc. which can be easily damaged by acidic cleaners). Unfortunately it doesn't work well for that purpose. The colors on the chart are not distinct enough and there is one mauve/purple shade on the color chart where almost the same color is defined as both highly acidic and highly base. That was the color of the first product I tested - so it told me nothing. The second liquid I tested turned the paper a bright blue which wasn't remotely similar to any of the colors on the chart.
So it might be a fun toy for children to show them the basics of how different levels of acidity turn the paper different colors, but I did not find it useful for actual measurements.