Dr. Stone - Vol. 8 Ch. 68 - Flame of Revolution

[MangaDex]

 

[moel]

whooaaaa

 

[Gambino]

as i said by chapter 80 they already gonna have iron man suits

 

[GoblinGuy]

Minor addition to the information given in this chapter: that method of casting is called lost-wax casting. You suspend the wax in a container, pour in a special type of refractory (withstands heat well but falls apart in water), ideally use a vacuum chamber to get out the bubbles, then burn out the wax first. Senkuu kinda implied they just pour in the metal while the wax is in there, so I mostly felt I had to add that part of the information.
One "recipe" for investment refractory I've found is 89% silica, 3% fused magnesia, 6% ammonium dihydrogen phosphate and 2% magnesium dihydrogen phosphate.

 

[BasicEden]

I can get where senkuu is coming from but the ultimate primate is right.. I can't help but think like the villain because our beliefs align which is why it pains me to watch this manga where senkuu is literally bringing back the world of rot. It's true the world is always going to be rotten with humans in it that's just facts. Human greed is a terrible thing but the world becomes so much worse with the advancement of technology. Especially in this world birthed brand new with only one group of civilization that weren't brought back to life through undoing their petrifaction. I know for weak people technology is the only way to protect themselves but just because you are weak you are going to introduce the world to guns? What next Missles? Nukes? Remind anyone of history? My fault bout this, I'm just venting to procrastinate