If you’ve printed with photopolymer resins, you know that you need alcohol. Lots of alcohol. It makes sense that people would like to reuse the alcohol both to be environmentally responsible and ...
It turns out that a hot solution of alum (ammonium aluminum sulfate), which is available in the spice rack of your local supermarket, will dissolve the steel drill bit without reacting with the brass.
In mid October, the city’s water department treated the water in the 350-acre North Fork Reservoir with aluminum sulfate, a salt that was supposed to clear up the water near the surface by causing the ...