#video of #manufacturing silicone molds by thinning white silicone caulk with white spirit, painting it a couple millimeters thick onto a plaster (?) form over a wax mold release, backing it up with 5mm more of silicone caulk, backing that up with plaster, and using more plaster (with a little soapy water to prevent bubble adhesion) to make an object in the mold. Then, two-component polyurethane resin.
#video on how A-frame tents are making a resurgence among ultralight hikers despite being a thousands-of-years-old design. Ten minutes of mostly overwrought talking-head filler to express one sentence. #camping #scouting
#video on how to stop fiber #lasers from drilling holes in your walls. Commenters suggest wet rockwool, rotating discs, and waterfalls.
#video on how to design safe pointer #lasers so they don’t short-circuit their batteries.
#video #toread on #DIY #manufacturing rubrene, which is apparently a red- or yellow-fluorescent polycyclic aromatic hydrocarbon (5,6,11,12-tetraphenylnaphthacene), which apparently took him two years. Also it’s used as an organic semiconductor in OLED displays. #materials
#Xyla-Foxlin #video on #3D-printing a rocket out of some kind of carbon-fiber-filled filament and #flying it. On her third attempt she broke the sound barrier.
#video on "Cerro Gordo", California, which apparently this YouTuber named "Brent Underwood" bought 5½ years ago? Somewhat mountainous semi-arid desert. The video seems like mostly a bunch of people hanging out in the desert and the old mineshafts and recovering artifacts, but without recording where they found them. Near Nevada. #toread?
#Clough42 #machining #video about using fixture plates instead of vises. #toread
#video of #DIY #jugaad body armor made out of a fiberglass welding blanket duct-taped to two layers of fired-clay ceramic tiles, which is able to stop some pistol and rifle bullets.
#video of #Evan-and-Katelyn #DIY #manufacturing a table with mannequin legs wearing high heels and also some worse ideas. #humor
#humor #video of #Evan-and-Katelyn ordering probably worthless and useless products