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indicator paper
/ˈɪndᵻkˌeɪɾɚ pˈeɪpɚ/
/ˈɪndɪkˌeɪtə pˈeɪpə/
Indicator paper
01
Indikatorpapier, Lackmuspapier
a special paper treated with chemicals that change color in response to certain conditions, used to test for the presence of specific substances or measure pH levels
