dipping fabric samples in {TAIL ~ the 10% acid solution} using a glass tray to contain {HEAD ~ the acid}, 
dipping fabric samples in { TAIL ~ the 10 % acid solution } using a glass tray to contain { HEAD ~ the acid } ,
OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH