Maybe this might help.
The image removes bromine yellowing of old telephone keypad
The keypad is double injection ABS and the string is white.
I heard that cream type peroxide was used to remove discoloration of parts that could not be disassembled.
Retr0bright - a cautionary tale
-
lsoelxi
- Location: KR
- Main keyboard: MKG-1
- Main mouse: K95
- Favorite switch: Futaba MA41
Maybe this might help.
The image removes bromine yellowing of old telephone keypad
The keypad is double injection ABS and the string is white.
I heard that cream type peroxide was used to remove discoloration of parts that could not be disassembled.