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You don't want concentrated lye, but diluted lye is safe enough to make soap. My question, and I'm not the only one asking in this thread, is- is a mixture of borax and lye a good coolant for a supercomputer?
I guess you could argue that the green is so they would recognize a coolant leak...
Borax is used for flushing large coolant systems. The green dye is probably to find leaks or identify when the flush has cleared out any residual coolant.
Ah, that makes more sense then.
But lye as well?
Edit: never mind, that discussion says also lye.
They use this mixture at my work as well. Flushing out large sub freezing cooling systems. We don't dump it out on the street though.
If it's anything like the places I work, they specifically tell you to be very careful about what you wash away.
The lye concentration used to make soap is rather nasty if it gets on your skin and you don't deal with it immediately. Source: I've made a lot of soap from scratch.