Topic: Etch your wallet into a copper plate - page 2. (Read 6324 times)
Yeah, it's not expected to last forever. But it'll outlast you inside a sealed box by a longshot.
PCBs get a nice brown layer on them if they aren't coated with a shellac. So that's a good idea. Dropping one into an acrylic resin block would be cool and even better.
But even so they last a long long time. And you're not likely to keep your PCB QR code out in the weather. More likely in a dry safety deposit box.
But even so they last a long long time. And you're not likely to keep your PCB QR code out in the weather. More likely in a dry safety deposit box.
I used to make my own custom circuit boards. The process is simple:
- You get a blank copper board from an electronic supply house(or ebay).
- Then you print out a negative of your circuit design on a transparency.
- You apply UV sensitive acid resistant ink to the whole board
- You put the transparency over the board and bake it with bright UV light
- Wherever the light goes through the transparency the ink will stay on, you wash the rest off with water
- Then you expose the board to acid and everywhere you don't have acid resist ink dissolves away
- You then wash off the acid and ink and have your design in copper
I just realized you could put a negative of your QR code and key strings on the board instead of a circuit and you would get a very resilient wallet.
Just an idea, have not actually tried it.
- You get a blank copper board from an electronic supply house(or ebay).
- Then you print out a negative of your circuit design on a transparency.
- You apply UV sensitive acid resistant ink to the whole board
- You put the transparency over the board and bake it with bright UV light
- Wherever the light goes through the transparency the ink will stay on, you wash the rest off with water
- Then you expose the board to acid and everywhere you don't have acid resist ink dissolves away
- You then wash off the acid and ink and have your design in copper
I just realized you could put a negative of your QR code and key strings on the board instead of a circuit and you would get a very resilient wallet.
Just an idea, have not actually tried it.
That's a cool idea.
I would never trust copper to keep etched pattern safe from corrosion. Just think green patina on the roofs and statues.
- Paper (used in "paper wallets")
- Hard drives (used in "digital wallets")
- (arguably) Humans (used in "brain wallets")
Quote
The corrosion rate of several types of copper in a 20-yr test averaged 1 pm/yr (0.05 mpy) in an industrial atmosphere and 0.8 pm/yr (0.03 mpy) in a marine atmosphere.
That's all neat and scientific, but here is a typical state of copper coins (a copper-based alloy, that is):
Many of them look shitty.
Again, there's no way I'll trust copper to keep etched pattern safe. Stainless steel, aluminum, gold of course.
I used to make my own custom circuit boards. The process is simple:
- You get a blank copper board from an electronic supply house(or ebay).
- Then you print out a negative of your circuit design on a transparency.
- You apply UV sensitive acid resistant ink to the whole board
- You put the transparency over the board and bake it with bright UV light
- Wherever the light goes through the transparency the ink will stay on, you wash the rest off with water
- Then you expose the board to acid and everywhere you don't have acid resist ink dissolves away
- You then wash off the acid and ink and have your design in copper
I just realized you could put a negative of your QR code and key strings on the board instead of a circuit and you would get a very resilient wallet.
Just an idea, have not actually tried it.
- You get a blank copper board from an electronic supply house(or ebay).
- Then you print out a negative of your circuit design on a transparency.
- You apply UV sensitive acid resistant ink to the whole board
- You put the transparency over the board and bake it with bright UV light
- Wherever the light goes through the transparency the ink will stay on, you wash the rest off with water
- Then you expose the board to acid and everywhere you don't have acid resist ink dissolves away
- You then wash off the acid and ink and have your design in copper
I just realized you could put a negative of your QR code and key strings on the board instead of a circuit and you would get a very resilient wallet.
Just an idea, have not actually tried it.
That's a cool idea.
I would never trust copper to keep etched pattern safe from corrosion. Just think green patina on the roofs and statues.
- Paper (used in "paper wallets")
- Hard drives (used in "digital wallets")
- (arguably) Humans (used in "brain wallets")
Quote
The corrosion rate of several types of copper in a 20-yr test averaged 1 pm/yr (0.05 mpy) in an industrial atmosphere and 0.8 pm/yr (0.03 mpy) in a marine atmosphere.
I used to make my own custom circuit boards. The process is simple:
- You get a blank copper board from an electronic supply house(or ebay).
- Then you print out a negative of your circuit design on a transparency.
- You apply UV sensitive acid resistant ink to the whole board
- You put the transparency over the board and bake it with bright UV light
- Wherever the light goes through the transparency the ink will stay on, you wash the rest off with water
- Then you expose the board to acid and everywhere you don't have acid resist ink dissolves away
- You then wash off the acid and ink and have your design in copper
I just realized you could put a negative of your QR code and key strings on the board instead of a circuit and you would get a very resilient wallet.
Just an idea, have not actually tried it.
- You get a blank copper board from an electronic supply house(or ebay).
- Then you print out a negative of your circuit design on a transparency.
- You apply UV sensitive acid resistant ink to the whole board
- You put the transparency over the board and bake it with bright UV light
- Wherever the light goes through the transparency the ink will stay on, you wash the rest off with water
- Then you expose the board to acid and everywhere you don't have acid resist ink dissolves away
- You then wash off the acid and ink and have your design in copper
I just realized you could put a negative of your QR code and key strings on the board instead of a circuit and you would get a very resilient wallet.
Just an idea, have not actually tried it.
That's a cool idea.
I would never trust copper to keep etched pattern safe from corrosion. Just think green patina on the roofs and statues.
Here is a site that goes through the process: http://www.riccibitti.com/pcb/pcb.htm
You can get all the supplies off of ebay or radio shack/the source or any decent electronics store.
CR-80 size(credit card size) would be nice
You can get all the supplies off of ebay or radio shack/the source or any decent electronics store.
CR-80 size(credit card size) would be nice
Any pointers on where to get the ink and acid?
Both easily available at any electronics supplier. Even Radio Shack.Also you can do this with laser printer output and ironing it onto the copper. It's not as crisp and clear but should work for QR codes as long as not too small.
I also think you can do the same with thin gauge steel. I remember reading a web article showing how to use the same idea that way.
Your local CNC sheet metal shop can also cut a design into steel real quick for a fee.
You can order 10 5cm x 5cm high quality PCBs from China on the web for $10 but they would have photo resist on them (the blue/green/red coating).
Any pointers on where to get the ink and acid?
I used to make my own custom circuit boards. The process is simple:
- You get a blank copper board from an electronic supply house(or ebay).
- Then you print out a negative of your circuit design on a transparency.
- You apply UV sensitive acid resistant ink to the whole board
- You put the transparency over the board and bake it with bright UV light
- Wherever the light goes through the transparency the ink will stay on, you wash the rest off with water
- Then you expose the board to acid and everywhere you don't have acid resist ink dissolves away
- You then wash off the acid and ink and have your design in copper
I just realized you could put a negative of your QR code and key strings on the board instead of a circuit and you would get a very resilient wallet.
Just an idea, have not actually tried it.
- You get a blank copper board from an electronic supply house(or ebay).
- Then you print out a negative of your circuit design on a transparency.
- You apply UV sensitive acid resistant ink to the whole board
- You put the transparency over the board and bake it with bright UV light
- Wherever the light goes through the transparency the ink will stay on, you wash the rest off with water
- Then you expose the board to acid and everywhere you don't have acid resist ink dissolves away
- You then wash off the acid and ink and have your design in copper
I just realized you could put a negative of your QR code and key strings on the board instead of a circuit and you would get a very resilient wallet.
Just an idea, have not actually tried it.
That's a cool idea.
I used to make my own custom circuit boards. The process is simple:
- You get a blank copper board from an electronic supply house(or ebay).
- Then you print out a negative of your circuit design on a transparency.
- You apply UV sensitive acid resistant ink to the whole board
- You put the transparency over the board and bake it with bright UV light
- Wherever the light goes through the transparency the ink will stay on, you wash the rest off with water
- Then you expose the board to acid and everywhere you don't have acid resist ink dissolves away
- You then wash off the acid and ink and have your design in copper
I just realized you could put a negative of your QR code and key strings on the board instead of a circuit and you would get a very resilient wallet.
Just an idea, have not actually tried it.
- You get a blank copper board from an electronic supply house(or ebay).
- Then you print out a negative of your circuit design on a transparency.
- You apply UV sensitive acid resistant ink to the whole board
- You put the transparency over the board and bake it with bright UV light
- Wherever the light goes through the transparency the ink will stay on, you wash the rest off with water
- Then you expose the board to acid and everywhere you don't have acid resist ink dissolves away
- You then wash off the acid and ink and have your design in copper
I just realized you could put a negative of your QR code and key strings on the board instead of a circuit and you would get a very resilient wallet.
Just an idea, have not actually tried it.
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