SOLARIZING
Scrabble letter values: S1O1L1A1R1I1Z10I1N1G2 = 20
Definition
SOLARIZING is the present participle of SOLARIZE.
verb SOLARIZE: reverse some of the tones of (a negative or print) and introduce pronounced outlines of highlights, by exposing it briefly to light, then washing and redeveloping it.
Synonyms of SOLARIZE: solarise