bichromate filter

17 LETTERS · STARTS WITH B

bichromate filter is a valid 17-letter word worth 28 points in Scrabble and 31 points in Words with Friends.

SCRABBLE WORDS WITH FRIENDS

B3I1C3H4R1O1M3A1T1E1F4I1L1T1E1R1

3 + 1 + 3 + 4 + 1 + 1 + 3 + 1 + 1 + 1 + 0 + 4 + 1 + 1 + 1 + 1 + 1 =28 PTS

DOUBLE WORD → 56TRIPLE WORD → 84

MEANING

What does bichromate filter mean?