Homemade pH paper shelf life?

As a portion of a science fair experiment, we are making pH paper today with red cabbage. I know it is not terribly accurate, but it will suit our purposes. My question is: How long can the excess papers be stored? While I plan to give some away, I cannot possibly use the remaining papers in the next few days. I would like to have them on-hand for future experiments.

Comments

  • if it is wet or dry, I will bet it would be fine for quite some time ..

    if youwrap it air tight &store it in the freezer

    If it is dry, it might last until you are ready,

    by keeping it wrapped in plastic & at least refrigerated

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