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BSR (Member Profile)
Your video, Prince Rupert's Drop EXPLODING in Epoxy Resin, has made it into the Top 15 New Videos listing. Congratulations on your achievement. For your contribution you have been awarded 1 Power Point.
Inside a Chinese 3D Printing Factory - in Shenzhen, China
That was cool. Honest question: should you be able to open the cabinet door on a laser printing 3-D resin rig while the laser is running?
Vantablack can make a flat disk of aluminium float on water
Probably, but there are all kinds of clear coating. They could develop one with minimal reflective properties and minimal absorptive properties, but you're right, even then it would decrease the effectiveness, but maybe not so much that it would lose it's usefulness.
I think in most applications, the nano fibers are encased in resins or other chemicals that cause them to clump together, making them much safer (note that I don't say "making them safe").
In pure powder form, yeah, they're a bit scary to have something that can float in air that can also burst cell walls. I always used a facemask and gloves when I was in his "lab", and even so I'm sure I was contaminated. Now I wish I had worn a full anti-contamination suit.
Clearcoating this stuff would remove its blacker-than-black properties. It would then start to reflect light. At which point, why would you favor this expensive shit over regular paint? I haven't seen details on how the sprayable Vantablack is applied, but if it were mixed into a liquid for application, it would have the same problem, unless, somehow, the surface of the hardened material were burnt away, evaporated off, or chemically reduced so that the carbon material could protrude from the substrate, that may allow the light absorption properties to persist. But I don't know how they accomplish that, other than they say it's a complex process that requires a specialist. I still wouldn't try brushing up against it, just like I wouldn't try sitting there inhaling paint fumes after painting a car. There's a reason precautions are taken in that process as well. I just know that something small and damaging enough to burst cell membranes sounds like something I wouldn't want in a product I'm handling with direct contact with my skin, or with any remote possibility of it rubbing off and getting into the air.
Vantablack can make a flat disk of aluminium float on water
OK, as I said, I don't know exactly how Vantablack is applied, but nanotubes could easily be incorporated in powder coatings and be totally sealed in the coating.
If Vantablack is grown on the surface, it should be even more 'attached' at the molecular level to that surface, shouldn't it? Once the loose powder was cleaned off, that seems like it would be much better than paint at sticking permanently, no?
A sprayable paint version would have to be mixed with a liquid that makes it sprayable and makes it stick, so I would expect it to be 'sealed' in that liquid once it cures, just like any pigment in any paint. Also, clear coats could seal it in if that's not the case, at least as good as any other toxic paint. EDIT: Since nanofibers can withstand high temperatures, they could even bake on a clear powder coating that's WAY tougher than clear coat to seal it if needed.
Most paints use highly toxic chemicals too. Just because there's no lead doesn't mean it's non toxic....in fact, it might be MORE toxic, just not in the same "brain damaging" way.
I have actually personally worked with nanotubes. I had a friend I worked with that had a carbon fiber business that did dozens of experiments with it for multiple projects, including a carbon fiber bullet and machine-able solid carbon blocks. He'll probably be the one to watch to see how dangerous they are, he rarely used any type of protection and I'm sure he inhaled multiple grams worth of nanotubes in his time, and has them imbedded in his skin all over his body. All of his products used resin to liquefy and harden the nanotubes into the shapes he wanted, so in the end products, it was "sealed" into a non-powder form, but not during production.
Okay first off, powdercoating is different. It's a powder that is closer to glass than paint, and it's cured in an oven which melts it onto the surface. Vantablack is grown on a surface and they recommend it is never used in an application where skin contact is involved as it would be unsafe. The sprayable paint version uses another form of carbon nanotubes in a different structure, which is considered "safer," but there's not enough data on it for me to trust it. They also make no mention of it being "sealed" as you claim.
You can if you want. Lead paint was once considered safe, as was asbestos, and aspartame, and cigarettes (at least publicly). Go for it. But we won't agree.
Making a homemade carbon fibre hydrofoil kiteboard
Good job. I wonder how fast these can go. A pro should be able to make a wind driven water speed record.
He could have saved some weight by using expanding foam instead of wood as the core and using molds to form the pieces. Then the foam supplies both the pressure and heat to cure the resin, so no vacuum bags needed.
3D printing 100X faster and inspired by the Terminator movie
Prototyping or even making a master from which to make a mold from. With both types of printer, there is a level of finishing needed.
The resin types will have an area of unwanted structure at the top to adhere the model to the raising arm. That needs to be cut off and cleaned. One of the biggest advantages to the resin printers is that your layers can be incredibly thin, leaving you with an almost flawless model surface.
The filament and powder types can get a decent surface, but due to the thicker layers, you will still have to spend some time smoothing the entire model before making a mold.
So, is the highest best use of this prototyping?
3D printing 100X faster and inspired by the Terminator movie
Drawing it out of the liquid is how it's been done, I looked a bit more into what this company is doing... basically it's a continuous draw, instead of the normal method with incremental raises.
Here's a homemade Resin Printer from 2011 pulling it from the top. https://youtu.be/snOErpOP5Xk
I think what they're calling "new" is the idea to draw/pull the object out of the liquid (instead of the old way where you 'print' from above and sink the object into the bath of liquid.) This "new" way of doing it does mean you can make things as long/large as you like instead of being limited by the depth of your liquid basin, but I don't see anything else new or particularly exciting about it.
3D printing 100X faster and inspired by the Terminator movie
The filament style of 3d Printers are cheap to operate and can be made to nearly any size.
A resin printer needs a photopolymer, something that solidifies when exposed to UV light. They also need a fairly strong projector and lens, which limits their build area.
A filament printer can use a lot of various materials, the most common being PLA (a bioplastic made from renewable plant materials) and ABS. There are many other materials, some are specialty that have an almost rubber like flexibility to them, to a filament that is made from wood and a binder, which results in an printed object that can be sanded and stained. And, since you are moving a print head, the only limitation to the build size is how big you have made your printer.
I did not know that; so---why did the deposition 3Ds come into being? Was that about cost of materials, even though they are apparently 100X slower?
This is quite educational for me.
3D printing 100X faster and inspired by the Terminator movie
Resin 3D printers have been around since the late 1980's. It's not good for mass production because you have to use a photopolymer, which tends to be expensive.
All Your Pot Are Belong to Us
I'd endorse that fence made of pot-They have that resin stuff to mix with it that would make it hard as crete-A fitting tribute to a failed war-on-drugs and an equally as deficient immigration history.....If only we'd have listened to the fruit-pickers.
Awesome fountain pen is awesome!
Tags for this video have been changed from 'Custom, Namiki, Falcon Resin, Fountain, Pen, awesome' to 'Custom, Namiki, Falcon Resin, Fountain Pen, awesome' - edited by xxovercastxx
Uncomfortable Moments with Newt Gingrich
NEENER NEENER! I have the Limited Collector's Edition of the shirt, which came with a cloth map detailing all of Newt's obviously-victorious campaign trail, a leather-bound "making of" book with never-before-seen photographs of the future president, a behind-the-scenes DVD with all of his debate footage, and a resin maquette depicting Newt standing astride a pile of terrorist bodies with the US flag, whilst all 3 of his mistresses fight to cling to his legs.
>> ^deathcow:
I have the GOLD edition Newt T-shirt. It is made in America by H1-B visa'd Guatemalans.
It's Like Painting Fish In A Barrel
Wait, i don't understand what happens at #1:14 mark.
That fish was drawn in mostly white paint but he poured that resin and it turned red?
It's Like Painting Fish In A Barrel
*splat* big blob of resin falls outta nowhere on the last one
Awesome Shampoo Prank
When it started, I thought it was gonna be a repeat of police academy 2, where they use epoxy resin in the shampoo.