BREATHABLE FACE MASKS - AN OVERVIEW

Soaking alternatives of pH two and pH thirteen had been geared up by diluting 37% HCl and NaOH pellets respectively and modified by an Eutech pH 700 m. A pH 7 soaking Option was geared up by using de-ionized water. To every soaking Answer, pre-weighed biodegradable masks with mass M0 have been submerged in the solution and left to soak for the