Use of the hologram stickers:I have included 2 stickers in with each coin. This is in case you totally mess up putting it on or the first sticker gets tweaked somehow. Either way, it's pretty straightforward. There is a clear square in the middle of the hologram that will line up with the indent on the back of the coin. You need to create a paper wallet key pair, and print it out on a paper no wider than 0.5" in one dimension. It can be longer in the other dimension because it can be folded over. See this post for more info on the wallet:
If anyone is wondering about loading these, I would like to note that I will not personally load them. I want the end user to load it themselves. This is more secure, and it takes a key issue out of the equation - losing digital coins if the physical coin gets lost/stolen in shipping. Additionally, I don't want to be responsible for making 250 wallet/pairs that could be claimed I still have access to. More secure IMO.
For those of you that want to know how the key pair could possibly look, I made one in Illustrator with a wallet generated from
Cryptolife.net. It's 0.5" x 1.5", and would be folded accordion style into thirds. The space on the coin for the pair info is 0.5" x 0.5". The font used for this pair was 7pt, and it is perfectly legible when printed on a laserjet printer. I don't have an inkjet to test with, but I'm sure you could get similar results. Here it is:
FYI... thats a throw-away address, and no one should use it as it's now public.
-Fuse
Additionally, you could use a qrcode, as long as you have a printer capable of high resolution at smaller sizes. I was able to scan a wallet address as a QR code at a 0.5" x 0.5" size. I haven't tested Bram's QR code generator with the added NLG image, but I think that would be even cooler. You can find it here:
http://guldencoinqrcode.nl/.
You could also just print the wallet address, and then keep the private key separate. That way if you lose the coin, you never lose the digital coins loaded on it. You could also do a two-factor key pair... it's really all up to you how you want to "load" the coin.
Once you have the paper wallet, I found it was easier to attach the paper to the hologram first and then attach the hologram to the coin. I placed the hologram sticky side up on a flat surface and then carefully placed the paper on the sticker, aligning the sticker with the clear square in the middle. Once the paper was attached, I used a paperclip as an applicator of sorts to put the sticker on the coin. I didn't want my fingerprints to transfer to the sticker, or the oils on my hands to get on the coin. So I pressed the paperclip against the sticker while it was on the table, and then I was able to pick up the sticker without handling it directly. It also made it easier to place the sticker on the coin because my big fat fingers weren't in the way.
For reference, this is what it would end up like:
It's hard to write a good description of how I did all this, but I hope that helps. If needed, I can post a video of how I do it when I get home tonight.
-Fuse