Great idea! Could also do for treatments, splits etc.I am just about to put up a system.
You just print the card, laminate it and fix it to the hive. There are different ways to use it. My first idea is to use it with paperclips, that can be moved to show the status. Just like this.
Another way would be to use pushpins. Or within a metal hive lid with small magnets. I reckon it must be more weatherproof and the paperclips are not the last and best solution. Need to find an intelligent marker for this.
The first box shows if the hive is queenright vs. queenless and how old the queen is. Colour shows the year. The number is the last number of the year. (2013 = 3 = red.)
Second box shows temper: peaceful to hot temper. I think it is sort of a sting barometer.
Third box shows swarm activities.
Fourth box shows nectar collecting in summer and honey stores in winter.
Fifth box shows the varroa infestation status.
Put into a laminating foil...
..and baking it.
I cut ears on either side, so when I pushpin it, water doesn't reach the paper inside.
Mounted on the deep floor.
To move the paperclip you lift them with the hive tool and move them with the hive tool, too.
No paper and pen, no propolis sticky dictaphone. After you finished working the bees you simply walk along the hives and take a picture with your mobile phone. (You could take notes with paper&pen, but without the propolis.) Since there is a number on each picture you can identify the corresponding hive at home, where you can write down all the details and thus follow the development of that hive.
That's the basic idea.