Sean Michael Ragan of Make: Online says:
Simple, elegant garage casting hack here from Instructables user mikey77, who calls the stuff "Oogoo," which is, I think, a portmanteau of "Oobleck" and "Sugru."
How-To: Make cheap castable silicone from caulk
If you've ever bought casting silicone, you know it can be pretty expensive. If, seeking a cost-saving alternative, you've ever experimented with making castings using the dirt-cheap silicone caulk they sell at the hardware store, you know that it doesn't work very well. Large volumes set up very slowly, if at all.
Turns out, though, that mixing in some cornstarch accelerates the drying process; just how much depends on how much starch you add. The author recommends starting with a 1:1 mix. I'm not sure about his explanation that the process works because the hygroscopic starch carries moisture into the internal volume of the silicone, but in any case there are probably other additives that will accelerate the process as well as or better than cornstarch. You might even find one that's not opaque and allows for translucent castings.
A group of tech firms will meet today to plan the filing of an amicus brief in support of lawsuit to challenge U.S. President Donald Trump’s “Muslim Ban.” Trump’s order was issued on Friday, and restricts immigration from seven Muslim-majority countries in which Trump has no business interests. Adjacent Muslim-majority nations in which Trump does […]
The World Economic Forum asked “leaders from business, government, academia and nongovernmental and international organizations” to take a survey on the potential risks and benefits of different emerging technologies. They seemed to think the space technologies will have little benefit and pose little risk. Energy capture, storage, and transmission has the great promise and little […]
The graphene temporary tattoo seen here is the thinnest epidermal electronic device ever and according to the University of Texas at Austin researchers who developed it, the device can take some medical measurements as accurately as bulky wearable sensors like EKG monitors. From IEEE Spectrum: Graphene’s conformity to the skin might be what enables the […]
DJI is the world’s leading designer and producer of easy-to-fly drones and aerial photography systems. If you’re a drone enthusiast, you want a DJI. If you know absolutely nothing about drones and think they’re weird, if you win a DJI you’re going to become a drone enthusiast.Enter this giveaway (for free, yes) and you’ll get a […]
Although there will never be a consensus about the best way to make coffee, any coffee connoisseur will agree that controlling the grind of your beans and balancing water temperature are the keys to a tasty cup. Since your plastic coffee pot doesn’t really allow for that kind of customization, going back to the French […]