{TAIL ~ A solvent} for {HEAD ~ the leuco dye} to be prepared, e.g. methylene chloride, is added, and the pH is adjusted to about 10 
{ TAIL ~ A solvent } for { HEAD ~ the leuco dye } to be prepared , e.g. methylene chloride , is added , and the pH is adjusted to about 10
TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH