These fun and unusual dice were invented by physicist Heinrich Hemme from Aachen in Germany.
The result of the roll is not the number seen on the top face, but the arithmetic mean of the five visible faces. Black numbers are positive, red numbers negative. It may not be apparent at first glance, but just like a regular die, the opposite faces add up to 7!
Using the following procedure, the numbers 1 to 6 can be generated with equal probability:
- Roll the die.
- Add the visible black numbers.
- Subtract the visible red numbers.
- Divide the total by 5.
These dice are 22mm (7/8″) size – larger than usual to accommodate up to 16 pips on a side.
Size : 22mm (7/8inch)
Shape : rounded edges and corners
Colour : white with black spots.
Materials : injection-moulded plastic.
Other features : The blank dice are made in England from injection-moulded plastic. I use a precision jig system to machine the pip indents into exact position then colour them with a mica infused acrylic paint which is extremely hard-wearing.
Shipping Cost : 3.50 within UK, Royal Mail (untracked, 1st class). Flat rate of 10.00 GBP to the rest of the world (tracked airmail).
Shipping Times : 95% of orders are shipped within 2 working days. If a delay is expected, you will be informed.
Custom-made options : Some other colours are possible. Please contact me for availability and prices.