A SIMPLE KEY FOR ECO-FRIENDLY MASKS UNVEILED

Soaking methods of pH 2 and pH thirteen were being prepared by diluting 37% HCl and NaOH pellets respectively and altered by an Eutech pH 700 m. A pH seven soaking Resolution was prepared by using de-ionized drinking water. To each soaking Resolution, pre-weighed biodegradable masks with mass M0 were submerged in the answer and still left to s