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pH TEST PAPER: UNIVERSAL INDICATOR PAPER<br />
Universal Indicator Paper<br />
"A" HYDRION PAPER shows even pH. "B" HYDRION PAPER shows odd pH.

Fphoto-31829205A-2RM.jpg

pH TEST PAPER: UNIVERSAL INDICATOR PAPER
Universal Indicator Paper
"A" HYDRION PAPER shows even pH. "B" HYDRION PAPER shows odd pH.

Copyright:© 1992 Richard Megna - Fundamental Photographs

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Richard Megna
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