[No. 350] Printing Paper Wallets and Storage Precautions: Ink Smudging, Paper Degradation, and Fire/Flood Protection

Alice: "Rabbit-senpai, please look at the paper wallet I made the other day! My private and public keys are printed on it perfectly!"

Rabbit-senpai: "Ho, Alice, you've finally obtained your very own treasure map. Hmm, you managed to print it quite well. However, Alice, the paper wallet isn't the end of the adventure 'when you make it' . In fact, the true adventure begins 'after you've made it' ."

Alice: "Oh, is that so? I thought I was safe now..."

Rabbit-senpai: "Heh, you're naive! That treasure map, your paper wallet, is just a piece of paper. What do you think would happen if the ink smudged and became unreadable, the paper fell apart, or in the worst case, it was lost in a fire or flood?"

Alice: "Whoa! That's terrifying just to think about! My precious Bitcoin...!"

Rabbit-senpai: "Exactly, right? That's why this time, we're going on a very important adventure to learn 'how to protect' that precious treasure map, your paper wallet! I, Rabbit-senpai, will teach you the secret techniques to protect your assets from ink smudging, paper degradation, and the trials of fire and water! Are you ready?"

Alice: "Yes! Please teach me, Rabbit-senpai!"

The Ritual of Printing a Paper Wallet: Choose the Best Paper and Ink!

Alice: "Rabbit-senpai, first about the printing, what kind of printer and ink should I use? Is regular copy paper not good enough?"

Rabbit-senpai: "Good question, Alice. Printing a paper wallet is like a 'sacred ritual' . Paying attention to every detail leads to peace of mind later on. First, regarding the printer, my recommendation is definitely alaser printer."

Alice: "A laser printer? Why is that?"

Rabbit-senpai: "Because a laser printer uses a powdered ink called 'toner' that is fused to the paper with heat, so compared to the liquid ink used in inkjet printers, it ismore resistant to smudging from water and less prone to fading from UV rays. It is also considered relatively resistant to high temperatures and humidity."

Alice: "I see! It would be a disaster if the letters smudged when wet. What if I only have an inkjet printer...?"

Rabbit-senpai: "Hmm, in that case, I strongly recommend using 'pigment ink' . It has significantly better water and light resistance than dye ink. However, you might not be able to expect the same durability as a laser printer. Also, make sure to choosehigh-quality genuine ink. Don't be stingy."

Alice: "Yes! How about the paper? Is special paper better?"

Rabbit-senpai: "That's right. Flimsy paper won't give you peace of mind. First, it's basic to choose 'high-quality neutral paper' or 'archival paper' used for official documents. Acidic paper tends to yellow and fall apart over time."

Alice: "Neutral paper... I'll make a note of that!"

Rabbit-senpai: "Furthermore, 'water-resistant paper' and 'synthetic paper' (sometimes called Yupo paper) are also very effective. These prevent ink smudging from water and damage to the paper itself. They are tear-resistant and have excellent durability. Recently, there is water-resistant paper that supports both laser printers and inkjet pigment inks, so you should look for that. And if possible, choosingslightly thicker paper will increase physical strength and give you peace of mind."

Alice: "Water-resistant paper and thick paper... it feels like I can make the ultimate paper wallet!"

Rabbit-senpai: "Indeed. And print quality is also important. Always make sure that the text, especially the private key and QR code, is 'printed clearly and sharply' . If it's even slightly blurred or unclear, you might find yourself unable to read it when you need it most, and you'll be crying over it."

Alice: "If the QR code can't be read, then it can't be scanned, right?"

Rabbit-senpai: "And one of the most important rituals is the 'printing environment'. Whether you are using a paper wallet generation tool or printing, you must always do it on a computer that is completely disconnected from the internet and offline. This is a golden rule to avoid the risk of private key theft by malware or viruses. The printer you use should also ideally be one that is not normally connected to the internet, or one that can completely erase its internal memory after printing. There is a non-zero chance that print data could remain in the printer's memory, after all."

Alice: "Offline...! You're really thorough!"

Rabbit-senpai: "To protect your assets, that level of thoroughness is necessary. Finally, print at least two copies, preferably three or more, and check that each one is printed accurately and that the QR code can be read. And, to be sure the wallet actually works, I strongly recommend sending a very small amount of cryptocurrency to test it. This will prevent the tragedy of having a 'useless treasure map' when you need it most."

Alice: "I see! Test transactions are important! Is the printing ritual perfect now?"

Rabbit-senpai: "Yes, you've cleared the first hurdle. Next, I will teach you the secret arts of how to protect that sacred printed material!"

Become the Guardian of Paper! The Silent Battle Against Degradation: Secret Arts to Protect Against Light, Humidity, and Oxidation

Alice: "Rabbit-senpai, the printing is perfect! But I have this image that paper yellows over time, or gets old and falls apart... is that okay?"

Rabbit-senpai: "Alice, that's correct. Paper isn't a living thing, but it is a delicate existence that gradually degrades depending on the environment. That is precisely why we must become 'Guardians of Paper' and take on the silent battle against degradation."

Alice: "Guardian of Paper...! That sounds cool! What should I do specifically?"

Rabbit-senpai: "First, one of the greatest enemies of paper is 'light', especially ultraviolet rays. Not just direct sunlight, but even the light from fluorescent room lamps can accelerate the degradation of paper and ink if exposed for long periods. Therefore, the basic rule is to store paper wallets in light-shielding files, envelopes, or dedicated containers."

Alice: "So sunlight and fluorescent lights are bad too. I have to hide them in a dark place..."

Rabbit-senpai: "Next, you must be wary of 'humidity' and 'temperature'. Hot and humid places can cause mold and stains, or make the paper soggy. Conversely, if it's too dry, the paper can become brittle. The ideal is a cool, dark place with little change in temperature and humidity, what is known as a 'cool, dark place'."

Alice: "Like the back of a closet...?"

Rabbit-senpai: "Yes, choosing the right location is important. Furthermore, there is an invisible enemy called 'oxidation'. Paper also gradually degrades just by being exposed to air. To prevent this, it is effective to put the paper wallet in a sealable bag. For example, a food storage bag like a Ziploc is fine, and for perfection, 'vacuum packing' is one option. Alternatively, it also helps with flood protection, which we'll discuss later, but 'laminating' is also useful for preventing oxidation."

Alice: "Vacuum packing! Like meat! Lamination is that thing you often see on restaurant menus, right?"

Rabbit-senpai: "That's right. Lamination protects paper from air and moisture by sandwiching it between plastic films. However, it is wise to test it with a test print beforehand to see if the heat from the laminating machine will alter the ink. Especially since cheap home laminators can sometimes be difficult to control for temperature."

Alice: "I see, so lamination isn't a cure-all either."

Rabbit-senpai: "Finally, don't forget 'physical protection'. Paper wallets can be folded, torn, or stained by liquids. To prevent that, it's a good idea to put them in a hard card case or a plastic sleeve. In any case, it is essential not to handle them roughly and to store them carefully."

Alice: "Light, humidity, temperature, oxidation, and physical damage... protecting paper is surprisingly hard work."

Rabbit-senpai: "That's right. However, by taking these measures, you can significantly extend the lifespan of your paper wallet. It is truly the duty of a guardian!"

Trials of Fire and Water! The Ironclad Defense to Protect Paper Wallets from Disasters: Preparing for Fires and Floods

Alice: "Rabbit-senpai, I understand how to protect them from light and humidity! But what I'm more afraid of is disasters... If a fire breaks out or my house gets flooded, since paper wallets are made of paper, they might burn up or get soaked and become unreadable, right...?"

Rabbit-senpai: "Hmm, as you say, Alice, fire and water damage are among the greatest threats to a paper wallet. It is truly a trial of fire and water. However, there is an ironclad defense to overcome these trials."

Alice: "Really!? Please tell me!"

Rabbit-senpai: "First, regarding fire protection, the most recommended method is to use a fireproof safe or a fireproof bag. Fireproof safes are designed to withstand high temperatures for a certain period. There are various types, from affordable home models to sturdy commercial ones. Fireproof bags are more convenient than safes, but their fire resistance varies by product, so it is important to check them carefully."

Alice: "A fireproof safe! That sounds like it would keep them from burning!"

Rabbit-senpai: "Indeed. However, you must remember that it is not perfect. Depending on the scale of the fire and the performance of the safe, the internal temperature could rise, and there is a non-zero possibility that the paper could degrade. Therefore, to increase safety, as I mentioned earlier, you can print multiple copies and store them in multiple fireproof facilities located in different geographical areas. For example, a fireproof safe at home, one at a trusted relative's house, or a bank safety deposit box (depending on the contract). If one location is damaged, you can still protect your assets if the others are safe."

Alice: "Distributed storage...! You're spreading the risk!"

Rabbit-senpai: "Next is flood protection. It is best to think of this in conjunction with a fireproof safe. Many fireproof safes also have waterproof features, but they are not always perfect. Therefore, it is more reliable to place the paper wallet in a highly airtight waterproof case or waterproof bag before storing it in the fireproof safe. Of course, lamination is also an effective measure against water damage."

Alice: "So I should think about both fireproofing and waterproofing!"

Rabbit-senpai: "That's right. And, as a basic rule, choose a storage location that is as high as possible. This is to reduce the risk of flooding as much as possible. You should avoid places near the floor or basements."

Alice: "True, water does collect in low places."

Rabbit-senpai: "For both fire and flood protection, there is no such thing as 'absolutely safe'. That is why it is important to combine multiple measures to reduce risk as much as possible. For example, you could put a laminated paper wallet into a waterproof bag, and then put that into a fireproof bag, and store it in a fireproof safe."

Alice: "If I go that far, I think I can feel quite secure!"

Rabbit-senpai: "Indeed. Better safe than sorry. With this, you should be able to face the trials of fire and water!"

Battle Against the Invisible Enemy! The Ultimate Hideout to Prevent Theft and Loss: Physical Security and Digital Encryption

Alice: "Rabbit-senpai, I'm all set for disaster protection! But there's one more thing I'm worried about... someone stealing it or forgetting where I put it. Since a paper wallet is just a piece of paper, it seems like it could easily go missing..."

Rabbit-senpai: "Hmm, your concern is valid, Alice. Beyond the visible threat of disasters, the 'invisible enemy', or the battle against theft and loss, is also an important point in managing paper wallets. You must find the ultimate hideout and strengthen your defenses."

Alice: "The ultimate hideout...! Where could it be?"

Rabbit-senpai: "First, regarding the physical storage location, a bank safe deposit box is one option. It is protected by strict security. Alternatively, installing a safe with a lock (one primarily intended for theft prevention, separate from a fireproof safe) at home would also be good. In any case, it is essential to store it in a place that third parties cannot easily access."

Alice: "A safe deposit box... that sounds pretty serious."

Rabbit-senpai: "The next important thing is 'maintaining secrecy'. You must not talk lightly about the existence of the paper wallet or its storage location to others. Even if it is someone you trust, you never know where information might leak from."

Alice: "Yeah, I'll keep it a secret!"

Rabbit-senpai: "And, this is a slightly more advanced technique, but there is a way to put a 'digital lock' on the paper wallet itself. This is called 'BIP38 encryption'. This is a technology that encrypts the private key of the paper wallet with a passphrase you set. Without this passphrase, even if the paper wallet is stolen, the private key inside cannot be read."

Alice: "Whoa! You can encrypt something printed on paper? That's amazing!"

Rabbit-senpai: "That's right. However, you must never forget that passphrase, and you need to store it safely in a completely different place from the paper wallet. If you forget the passphrase, you yourself will no longer be able to access your assets. It is truly a double-edged sword."

Alice: "Managing the passphrase is also important..."

Rabbit-senpai: "And, here too, 'creating multiple copies and storing them in different locations' is effective. If you lose one part, you can avoid losing your assets if you have other copies. However, as the number of copies increases, the effort of management and the risk of theft may also increase, so balance is important."

Alice: "The number of copies is also something to worry about."

Rabbit-senpai: "Finally, no matter how perfectly you think you have stored it, you must not forget to periodically check the condition of the paper wallet. Even if it's just once every few years, check if the printing is fading, if the paper is deteriorating, and if the storage location is safe. If you see signs of deterioration, you should also consider transferring your assets to a new paper wallet."

Alice: "It's like a regular check-up!"

Rabbit-senpai: "Exactly. In the battle against invisible enemies, you must never let your guard down."

Rabbit-senpai's Warning! The Limits of Paper Wallets and Tips for Withdrawing: Overconfidence is Forbidden!

Alice: "Rabbit-senpai, after hearing about all these measures, I really feel that paper wallets are safe! With this, my Bitcoin is definitely safe, right!"

Rabbit-senpai: "Alice-chan, that confidence is wonderful, but here, I must sound a 'warning'. Paper wallets are indeed stored offline, so the risk of online hacking is extremely low. However, 'absolutely safe' things do not exist in this world."

Alice: "Eh... is that so?"

Rabbit-senpai: "Yes. As we have discussed so far, paper wallets are always accompanied by physical vulnerabilities. Paper deterioration, fire, flood, theft, loss... no matter how many measures you take, you cannot reduce the risk to zero. It is important to always be aware of these 'limitations of paper wallets'. Overconfidence is forbidden."

Alice: "Yes... I will keep that in mind."

Rabbit-senpai: "That is why many experts recommend not relying solely on paper wallets, but combining them with other storage methods to diversify risk. For example, use a convenient software wallet for small amounts for daily use, a highly secure hardware wallet for large assets, and use a paper wallet as the ultimate backup for that hardware wallet."

Alice: "Hardware wallets... is it? Another new thing has appeared!"

Rabbit-senpai: "I'll talk about that in detail in another adventure. For now, I will teach you the know-how for 'withdrawing' assets from a paper wallet. This is another extremely critical phase."

Alice: "When withdrawing... you mean when using it, right?"

Rabbit-senpai: "That's right. To withdraw assets from a paper wallet, in other words, to send funds, you must input the private key printed on it into some form of online wallet software. This moment is the most dangerous moment when the private key emerges from the offline fortress into the online world."

Alice: "So there's a possibility of being targeted when inputting it online..."

Rabbit-senpai: "Exactly. If the computer or smartphone you are using to input it is infected with a virus like a keylogger (malware that steals keyboard input), the private key will be stolen in an instant. Therefore, when inputting a private key, you must use an absolutely trustworthy, clean device and a secure network environment. Public Wi-Fi and the like are out of the question."

Alice: "Wow, I have to be that careful?"

Rabbit-senpai: "And there is one more important principle. That is, 'a paper wallet that has been used online once should be considered to have reduced security and should not be reused'. If there are still assets remaining in the wallet, the ironclad rule is to promptly create a new paper wallet or move the entire balance to another secure wallet."

Alice: "Once I use it, that paper wallet is done for..."

Rabbit-senpai: "It is safer to think of it that way. Because once a private key is exposed online, you cannot deny the possibility that it has been copied somewhere. Paper wallets are profound because of their simplicity. It is essential to understand their characteristics and limitations well and use them wisely."

Alice: "Yes, Rabbit-senpai! I understand well how to handle paper wallets now!"

Rabbit-senpai's Quick Break Column: The Legendary 'Bitcoin Buried Treasure' and the Joys and Sorrows of Paper Wallets

Now, let me tell you a rather interesting story. It's about how important paper wallet storage is, and how it sometimes creates tragedy and sometimes comedy.

Do you know a person named James Howells in the UK? It seems he mined Bitcoin a long time ago, when it had very little value, and saved over 7,500 BTC on a hard drive. However, one day, he accidentally threw that hard drive away as trash! At today's value... oops, that's a terrifying amount to even calculate!

It is said that he is still asking the city council for permission to excavate the landfill where that hard drive is likely buried. It is truly a modern-day 'Bitcoin buried treasure legend'. This isn't a story about a paper wallet, but in terms of storing important data on physical media, it's a great lesson for us, isn't it?

Urban legends surrounding paper wallets are also whispered as if they were true. For example, once upon a time, an old man printed his Bitcoin on a paper wallet in hopes that the value would rise, and tucked it between the pages of an old encyclopedia. Years later, his grandchild, who learned that the Bitcoin had become incredibly valuable, searched the whole house but couldn't find it... just as they were about to give up, they happened to find that encyclopedia at a used bookstore and discovered the paper wallet inside! They became a billionaire overnight... or so the story goes. Well, maybe there's a little bit of Rabbit-senpai's creative flair in there, hehehe.

Conversely, there might have actually been tragedies where a child accidentally used the paper on which a paper wallet was printed for drawing, or it was put through a shredder. No matter how sturdy the safe or how excellent the encryption technology, it is sometimes powerless in the face of 'human carelessness'.

Here is a quiz! "When printing a paper wallet, which is said to be more resistant to water: dye ink or pigment ink for inkjet printers?" ... ...... ......... The answer is, pigment ink! Did you remember that?

Paper wallets create drama because of their simplicity. For some, they become a ticket to a dream, and for others, they become treasure lost forever. I, Rabbit-senpai, sincerely hope that your paper wallet does not become the latter. You must really, really think carefully about where to store it! And, once in a while, remember its existence. Because there is nothing sadder than a forgotten treasure map.

Summary

Alice: "Wow, today's adventure was so educational! I realized that a paper wallet isn't just something you print out; you really have to think about so many things, from how to print it and where to store it, to disaster prevention and theft protection. I feel like a knight guarding my own secret treasure!"

Rabbit-senpai: "Indeed, Alice, that's the spirit! Managing a paper wallet is one of those areas where the phrase ‘self-responsibility’ carries the most weight. But it is only by overcoming that that you can call yourself a true cryptocurrency adventurer."

Alice: "Yes! I'll make a list of everything I learned today and take proper precautions! With this, my paper wallet should be safe for sure!"

Rabbit-senpai: "Yes, that's the way. But Alice, don't let your guard down just because you've taken measures once. The environment changes, and new threats may emerge. It's important to always update your information and maintain an awareness of protecting your assets. If today's lesson helps you, and the readers of this article, protect your precious assets, then this Rabbit-senpai will be very happy."

Next Episode Preview

Alice: "Rabbit-senpai, I've got the hang of how to protect a paper wallet! But I felt that storing it on paper is a bit of a hassle when I want to use it. Isn't there a more convenient magic wallet in Wonderland that's easy to use every day?"

Rabbit-senpai: "Ho, Alice, you've noticed something quite sharp. It's true that a paper wallet is one of the ultimate forms of protection, but it might be a bit inconvenient for daily use. But don't worry, there are plenty of magic wallets in Wonderland that are easier to use and perfect for adventures in the digital world!"

Alice: "Really!? Yay!"

Rabbit-senpai: "Next time, it's called a ‘software wallet’! Let's go explore the world of convenient digital wallets that you can use on your smartphone or computer! Alice's adventure has only just begun! Look forward to the next episode of 'Alice and Rabbit-senpai's Cryptocurrency Wonderland Adventure Log: Learning from 1,000 Doors from Zero'!"

☕ Adventure Tips Corner ☕

Alice: "Rabbit-senpai! Today's story was so interesting! Somehow, after reading this article, I've started wanting to buy some cryptocurrency!"

Rabbit-senpai: "Whoa there, Alice, I understand that feeling well. But haste is forbidden. This adventure log is just a 'map' to help you understand how things work in Wonderland. It's not a 'treasure map'."

Alice: "Not a treasure map...?"

Rabbit-senpai: "That's right. This is by no means investment advice telling you to buy coins here. Investing is something you do based on your own judgment and responsibility, after studying thoroughly yourself, and using money that won't affect your daily life even if you lose it. If you get that wrong, you'll get lost in Wonderland. I really want you to keep that promise."

Alice: "Yes, I understand! With my own responsibility, right! But I also got a little worried, thinking, 'What if the information in this article is wrong?'"

Rabbit-senpai: "You've noticed a good point, Alice. This Rabbit-senpai tries to provide the most accurate information possible, but in this world, things change at the speed of light. Information might become outdated, or there might be misunderstandings. So, if any of the readers notice, 'Huh? This information might be a bit off,' it would be a great help if you could kindly let us know. We want to grow this adventure log into something even more wonderful together with everyone!"

Alice: "So it's an adventure log we make together! That's wonderful!"