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Comment: Re:Regulate gunpowder (Score 1) 856

by Locke2005 (#43698995) Attached to: California Lawmaker Wants 3-D Printers To Be Regulated
I'm pretty sure black power is just sulphur, charcoal, and saltpeter... and that's without bothering to even google the recipe. People have been casting their own bullets out of lead for hundreds of years now. Machining your own brass shell casings is probably more trouble than it's worth, but there are literally billions of them already out there, and they are generally reusable. Hardest part to make is the primer, but understand those are made out of mercury fulminate, which my dorm mate made in his room in college -- and he was a computer scientist, not a chemist. Wan't to skip all the complicated stuff, go back to using single-shot muzzle loaders, preferably flintlock. 200 year-old technology pretty easy to replicate today. And most likely pretty easy to make one that won't trigger a metal detector.

Comment: Re:Great fear mongering!!! (Score 1) 856

by Locke2005 (#43698943) Attached to: California Lawmaker Wants 3-D Printers To Be Regulated
Mostly plasting, except for the metal end carrying the primer, and of course the metal shot inside. But yes, I'm sure somebody has by now made non-ferrous ammo to go with the non-ferrous guns that have been around for a long time. In fact, ceramics are pretty strong now. I wouldn't reuse them like brass shell casings, but I'm pretty sure they could be designed to survive a single shot.

Comment: Re:No one tell him... (Score 1) 856

by Locke2005 (#43698895) Attached to: California Lawmaker Wants 3-D Printers To Be Regulated
Nobody buys a $1000 3D printer to make just one item, just like nobody plants a field of marijuana to get just one joint. Yee doesn't want the people that now go into the drug business to go into the gun illegal gun parts manufacturing business. But Pandora's box is already open, and stuffing everything back inside is now impossible... existing 3D printers can be used to make more 3D printers, in fact most 3D printers come with blueprints to replace easily warn parts and recommend that he first thing you make is spare parts!

Comment: Re:Lawmaker wants sheet metal to be regulated (Score 1) 856

by Locke2005 (#43698723) Attached to: California Lawmaker Wants 3-D Printers To Be Regulated
My coworker is a lot smater than Leland Yee-haw, and has figured out that the best way to make knife blades is by taking old hardened carbide steel files and grinding them down. I check his prototype, and yes, it had a much better edge on it than you could possibly get with a 3D printer. And yes, anything you can make with a 3D printer you can make much better with a full machine shop, provided you know what you're doing. When I was in college, my dorm mate went down to the local chemical store and bought everything he needed to make pyrotechnics (ok, the mercury for the mercury fulminate he made was stolen from the college chemstry lab). Kids can't do that anymore, because lawmakers can't tell the difference between pyrotechnics and explosives. Every fireworks display uses mortars, with the same name and principle of operation as the mortars used on the battefield. We now strongly discourage all Americans from learning how to make things for themselves, and as a consequence the Chinese are now much better at machining than we are.

Sigmund Freud is alleged to have said that in the last analysis the entire field of psychology may reduce to biological electrochemistry.

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