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Soaking solutions of pH two and pH thirteen ended up prepared by diluting 37% HCl and NaOH pellets respectively and modified by an Eutech pH 700 m. A pH seven soaking Remedy was ready by making use of de-ionized h2o. To each soaking solution, pre-weighed biodegradable masks with mass M0 ended up submerged in the answer and remaining to soak fo