Wratten filters in the deep-orange to infrared spectrum:
(as per a Kodak Wratten catalog from 1928)

#23
#23A
#23B
#24
#24A
#25
#26
#27
#27A
#28
#29
#89
#91
#89A
#88
#88A
#87
#87C
#87B
#87A


Exactly 20 different colors of red....:))