Reeve Angel Brand Filter Papers Grade 202, 11 cm. Provides minimum filtration speed of coarse particles. The surfaced is creped, hence it has a greater true surface area than smooth surface filter paper of the same diameter.
Red Litmus Test Paper, foolproof pH test to determine base, Test strip will turn blue if dipped into an alkaline solution (pH >7), Pocket-sized, lightweight vial, No color chart necessary, solution must be water-based
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