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