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