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kottke.org posts about 3D printing

The Harriet Tubman $20 Stamp

posted by Jason Kottke   Sep 18, 2018

Frustrated that the US Treasury Department is walking back plans to replace Andrew Jackson on the front of the $20 bill with Harriet Tubman, Dano Wall created a 3D-printed stamp that can be used to transform Jacksons into Tubmans on the twenties in your pocketbook.

Tubman $20 Stamp

Here’s a video of the stamp in action. Wall told The Awesome Foundation a little bit about the genesis of the project:

I was inspired by the news that Harriet Tubman would replace Andrew Jackson on the $20 bill, and subsequently saddened by the news that the Trump administration was walking back that plan. So I created a stamp to convert Jacksons into Tubmans myself. I have been stamping $20 bills and entering them into circulation for the last year, and gifting stamps to friends to do the same.

If you have access to a 3D printer (perhaps at your local library or you can also use a online 3D printing service), you can download the print files at Thingiverse and make your own stamp for use at home.

Wall also posted a link to some neat prior art: suffragettes in Britain modifying coins with a “VOTES FOR WOMEN” slogan in the early 20th century.

Votes For Women Coin

Update: Several men on Twitter are helpfully pointing out that, in their inexpert legal opinion, defacing bills in this way is illegal. Here’s what the law says (emphasis mine):

Defacement of currency is a violation of Title 18, Section 333 of the United States Code. Under this provision, currency defacement is generally defined as follows: Whoever mutilates, cuts, disfigures, perforates, unites or cements together, or does any other thing to any bank bill, draft, note, or other evidence of debt issued by any national banking association, Federal Reserve Bank, or Federal Reserve System, with intent to render such item(s) unfit to be reissued, shall be fined under this title or imprisoned not more than six months, or both.

The “with intent” bit is important, I think. The FAQ for a similar project has a good summary of the issues involved.

But we are putting political messages on the bills, not commercial advertisements. Because we all want these bills to stay in circulation and we’re stamping to send a message about an issue that’s important to us, it’s legal!

I’m not a lawyer, but as long as your intent isn’t to render these bills “unfit to be reissued”, you’re in the clear. Besides, if civil disobedience doesn’t stray into the gray areas of the law, is it really disobedience? (via @patrick_reames)

Update: Adafruit did an extensive investigation into the legality of this project. Their conclusion? “The production of the instructional video and the stamping of currency are both well within the law.”

DIY orthodontics

posted by Jason Kottke   Mar 14, 2016

Diy Braces

Amos Dudley wanted to improve his smile but didn’t want to pay thousands of dollars for Invisalign, so he 3D printed his own orthodontic aligners.

I took a mold of my teeth with some cheap alginate powder, Permastone, and a 3d printed impression tray, to get a better picture of what was really going on. Notice LI-r (right lateral incisor) projected outward, and CI-r (right central incisor) depressed inward and overlapping.

At the time of writing this, I’m an undergrad, which means that a) I’m broke, and b) I have access to expensive digital fabrication tools - definitely an unusual dichotomy. I was researching [name brand clear-aligner treatment], and I ran across a photo that caught my eye.

Those look like the layer striations from a 3D print!

What is to stop someone, who has access to a 3D printer, from making their own orthodontic aligners?

Update: Unsurprisingly, orthodontists feel that DIY dentistry is not such a great idea.

Belli notes, “He moved these teeth in only 16 weeks. You can cause a lot of problems with that. If you move a tooth too fast, you can actually cause damage to the bone and gums. And if you don’t put the tooth in the right position, you could throw off your bite,” leading to additional damage and wear on the teeth.

Queen Nefertiti freed from German museum

posted by Jason Kottke   Feb 22, 2016

The Neues Museum in Berlin is the current home of the bust of Queen Nefertiti, a singular piece of ancient Egyptian sculpture. A pair of artists went to the museum, did a 360° scan of the bust without the museum’s permission, and have made the resulting high-resolution 3D model available to all.

3d Nefertiti

In lieu of the contested original, a 3D-printed copy of the bust made from the model is now on display in Egypt at the American University of Cairo. (via hyperallergic)

Update: There’s cause to be skeptical about how the 3D scan of Nefertiti was accomplished and the artists are being a little vague as to how they did it. The video shows the artists using a Kinect Xbox controller but a Kinect scan can’t deliver the resolution level of the 3D model. Perhaps it was stitched together using a bunch of photos? Or maybe they hacked into the museum’s files and took their model?

The last possibility and reigning theory is that Ms. Badri and Mr. Nelles elusive hacker partners are literally real hackers who stole a copy of the high resolution scan from the Museum’s servers. A high resolution scan must exist as a high res 3D printed replica is already available for sale online.

The Free Universal Construction Kit

posted by Jason Kottke   Dec 16, 2015

Universal Construction Kit

The Free Universal Construction Kit is a collection of almost 80 adapters between various construction toys like Lego, Lincoln Logs, Duplo, and K’nex (10 toys in all). The kit is available as freely downloadable designs for your 3D printer. The MoMA announced the acquisition of the Construction Kit for their permanent collection earlier this year.

What was the Venus de Milo doing with her arms?

posted by Jason Kottke   Jul 03, 2015

The Venus de Milo’s arms are lost to history but that hasn’t stopped historians and scholars wondering what exactly she was doing with them when the statue was carved. In order to test out a theory that Venus was spinning thread, Virginia Postrel hired designer and artist Cosmo Wenman to construct a 3D model of Venus de Milo.

Venus De Milo with arms

Custom Citibike key

posted by Jason Kottke   Jun 19, 2015

Ted Power’s Citibike key broke, so he pried the chip out of it and 3D printed a new key with a built-in bottle opener.

Citibike Key Bottle

Power used Shapeways’ printing service to make the key. His exact key isn’t publicly available on the site, but you can print this cool multi-tool replacement. (via @dens)

The Apple II Watch

posted by Jason Kottke   Apr 09, 2015

This is magnificent. The little floppies!

And you can totally build your own with these instructions. Case is 3D printed and the chip & software run on the Arduino platform. So cool! (via devour)

Designer real estate for hermit crabs

posted by Jason Kottke   Feb 06, 2015

Aki Inomata Crab

Artist Aki Inomata builds fanciful new houses for hermit crabs.

Miniature windmills, churches, and even entire cities jut from the surface of her 3D-printed shells, which are modelled upon CT scans of abandoned crab shells and then recreated in transparent resin. Inomata then allows the homeless crabs to inspect the shelters at their leisure — she says “most hermit crabs don’t even glance at” them, but occasionally one of the creatures finds its dream real estate and settles in.

A 3D search engine

posted by Jason Kottke   Aug 07, 2014

Yobi3D is a search engine for finding 3D objects. Here’s a search for “horses”:

3d Horses

This is pretty neat…all the objects are zoomable and rotatable in the browser. (via prosthetic knowledge)

Ready to make your own Duchamp?

posted by Jason Kottke   Jul 07, 2014

Sometime around 1918 in Buenos Aires, Marcel Duchamp designed a chess set:

Duchamp chess set

Sometime earlier this year, Scott Kildall and Brian Sera used archival photos of the hard-to-find set, turned them into 3D models of the chess pieces, and made a pattern for 3D printing your own set:

Duchamp chess set

The community at Thingaverse is already busy making interesting variations of Duchamp’s set…look at this one:

Duchamp Chess 03

Something tells me Duchamp would have loved this whole thing.

Update: Welllllll, Duchamp may have loved this, but his estate definitely did not. Duchamp’s estate sent Kildall and Sera a cease and desist letter, forcing them to remove the 3D models from Thingiverse. Which, the irony! So, Kildall and Sera, riffing on Duchamp’s mustachioed Mona Lisa, have created a set of six 3D-printed chess pieces with mustaches modeled on the Duchamp set. Fantastic.

Duchamp Chess Mustache

Print your own gun

posted by Jason Kottke   Mar 26, 2013

Vice made a 24-minute documentary film about Cody Wilson, who is designing a semi-automatic weapon that can be printed out on a 3-D printer. You just download the plans, print it out, and there you go.

“Gun control is a fantasy” indeed.