Harriet Tubman Stamp

by danowall Jan 11, 2018
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If I ever get any bills with this stupid shit on it I'll take them straight to the bank for disposal and replaced by fresh Jacksons as it should be.
Then I'll take my "Donald J Trump Lives here --->" stamp that I have and put that right on the back where the white house is.

This is brilliant! Thank you.

The stamp engraving place is asking me for a JPEG of the image, but then asking me for the size I want the stamp to be. Any advice on what to tell them about these dimensions?

Yes, the exact dimensions of the stamp are 2.78 inches wide by 2.35 inches tall. A JPEG of the stamp is included in the file set for this project.

This is awesome. Printing it now.
And for those of you interested in the legality of stamping currency, have a look at this: https://blog.adafruit.com/2017/10/15/hey-steven-mnuchin-making-harriet-tubman-20s-seems-totally-ok-ustreasury-stevenmnuchin1/

Would you mind posting an .stl of the stamp itself? I don't have access to a laser cutter, and I'd like to experiment with making the stamp part from a flexible material like Ninja flex. Thanks!

Good idea, I'm working on making an STL version available, I'll upload when ready :)

I've got an STL version of the stamp now. I found a site that converts SVG's to STL fairly nicely. Once I get it sized properly and have tested it I can send it to you if you like.

This is fantastic news! What website did you use? I didn't have much luck with Simplify3d's image conversion tool, and had been translating the linework manually in Rhino. If you would be willing to share your STL I would certainly be interested to take a look. Thanks!

I have 2 versions of the stamp itself suitable for 3d printing now. The difference is in the size of the font (characters) used for the "TUBMAN" text. When I printed the first one the text is a bit hard to read, so I reworked the bitmap to increase the size and redid it. Both files have a 3 mm thick base which lines up with the stamp handles. So far I have had the best results by printing these in PLA.

This is great information, thank you for sharing. I've succeeded in getting a version up on Shapeways, though I have doubts that it will work well as a stamp due to its fragility and the material's inability to effectively transfer ink. https://www.shapeways.com/product/ALK7DM8ZN/tubman-stamp

I used selva3d.com (aka sur3d.com?) to convert from bitmap to SVG. It's not perfect, they keep losing the image size information, but I think it might still be good enough. It won't be as good as a laser cut rubber stamp, the resolution of 3d printing is not that fine. I had to redo the "TUBMAN" text to get it to print. I am not happy with the results using TPE (Nijaflex), so I am going to try printing with matte PLA instead. I'll keep you posted.

Any suggestions on a good online site to order the rubber stamp from?

While I'm at it, I also think one could put $20 bills in an inkjet printer and print the image that way...

@wbphelps Ok, I've added a fairly decent STL of the stamp face itself to the files for this project. I ended up reworking all the lines manually rather that giving it to an algorithm, as everything generated was difficult to print and needed alterations anyway. Thanks again for your collaborative help on this.

Thank you for bringing this website to my attention, it's a great resource!
I order stamp rubber from https://www.rubberstampmaterials.com/laserengravablerubberandpolymer.aspx

Great concept! I look forward to making one of these.

Very cool project! I just noticed the "Motion Picture Money". (Nice touch!) Where did you get that?

Oh, nevermind. (Thank you, Google!)

Still a very nice touch for your photos. Makes all the troll-comments even funnier. :-)

lol yeah there's lots of prop money available on ebay https://www.ebay.com/itm/263916026671
I used it to practice on when I was first prototyping different stamp ideas.

Major kudos on not feeding the trolls! Any chance you could upload a .stl file? I don't have illustrator, and for some reason the .dxf won't open. Thanks!

@intrepidnovice - i've added an .svg file for the stamp, hopefully that will work better for you than the .dxf or .ai files. the handle is the only part for which there is an .stl file, as the stamp is designed to be laser engraved (the .jpg works well for this too).
Stamp rubber can be found here: https://www.rubberstampmaterials.com/laserengravablerubberandpolymer.aspx

Wouldn"t this render the money useless in the eyes of the law? This probably should not be encouraged here. I noticed even you didn't use real currency for the pics so I assume you are aware of the law.
The following is the law on this subject...

Defacement of Currency -
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.
Visit www.secretservice.gov for additional information.

Your concerns are valid, however Section 333 does not specifically cover stamping, and the legal definition of defacement as outlined in Black's Law Dictionary (4th ed.) is "to mar or destroy the physical appearance ... so are to render it illegible or unrecognizable". This stamp does not mark bills in such a way as to make them unusable as legal tender. In fact, it follows in a long tradition of currency stamping campaigns such as "Where's George?", which has been stamping bills since 1997 and deemed by the Bureau of Engraving and Printing to be legal because "stamping ... a bill not destroy the bill". The website https://www.stampstampede.org/ is another notable example of currency stamping which does not meet the definition of defacement.
More info can be found here: https://blog.adafruit.com/2017/10/15/hey-steven-mnuchin-making-harriet-tubman-20s-seems-totally-ok-ustreasury-stevenmnuchin1/

The intent of this project is as a humorous and mildly subversive response to Steve Mnuchin's wavering on the decision to replace Andrew Jackson with Harriet Tubman on the $20:

I have made it available to others for free as a remix of the original https://www.thingiverse.com/thing:2541027

Stamp molds @ustreasury

Let's look at this from a different angle --

As you correctly state above, defacement is "to mar or destroy the physical appearance ... so [as] to render it illegible or unrecognizable". However, what you are failing to consider is the advent of digital scanners. The fact that your stamp replaces the image of Andrew Jackson, could then render the bill unreadable to electronic scanners (such as in Vending Machines, ATM's, etc.). With this said...I strongly suspect that your stamp renders the $20 bill unusable in daily digital commerce, and therefore illegal.

Do as you will. The First Amendment guarantee's free speech, and you may be able to take this legal stance when the Secret Service shows up.

Good point regarding digital scanners. Anecdotally, I have tried these out in a multiple different vending machines without issue, this type of stamp does not appear to affect a bill's readability by digital scanners (as a token of proof I have added a GIF of a bill being accepted to this project's file set). While currency stamping is in no way protected by the first amendment there is strong legal precedent in favor of stamping campaigns, which have historically been employed to bring public attention to certain issues, and in which tradition this stamp aims to follow.

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While I don't agree with mb03's name calling, this is a disgrace. Jackson is the greatest president we've ever had. The only president we've ever had to get rid of the central bank, and they tried to assassinate him for it.
There's reasons he's known as The People's President, try learning some history but take your modern PC glasses off first.

Greatest president? You're clearly not an indigenous American -- Jackson oversaw the Trail of Tears and other major acts of genocide against native populations.

I stand by my previous statement.

We're going to need a Jackson stamp if Tubs ever take off.