## 2. Make a 3D Mini Me

October 24, 2013### The UK supermarket chain, Asda, is currently trailing 3D in-store printing of mini-me figurines. Cost: £ 40 (€ 47 or $Aus 67 or $USA 64)

### Customers can buy 3D coloured versions of any person or object including the family car or dog (if Trixy can keep still for 2 mins) scaled down to an 8-inch figure.

### Now you too can play games with yourself. (Warning: Avoid wording involving ‘play with’ and ‘yourself’.)

It takes two minutes using a hand-held scanner to create the 3D image and 6 – 8 hours for the 3D printer to produce the figure.

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# The Virtual You

### 3D body scanning already exists so you can create a 1:1 scale avatar (A Mevatar, perhaps?) of youself for online shopping. By combining this technology with 3D printing the scaled-down Mini Me concept was born.

# 3D PRINTING: THE MATHS

### Maths is involved at every stage of the Mini Me production to produce the scanner, the scanner program, the printer and the printer program.

### It is the scale that is intriguing.

### The scale used by the 3D printer is approx 1:10 ratio.

# What?

### According to the BBC average man in England is 5ft 9in (175.3cm) tall and weighed 13.16 stone (83.6kg) and woman is 11 stone (70.2kg) and 5ft 3in tall (161.6cm).

### 3D printers use materials from brass to silver to ceramics so figurines can be quite heavy. Assuming the ceramic material has a similar density to the human body, the 1:10 scale male figurine would weight over 1 stone (8 kg) and a female 1 stone plus (7 kg)!

### Will shoppers be staggering home in York carrying 7kg figurines?????

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# Wait a minute:

### Mini Me Mathspig is just 1/1,000 of Big Mathspig

### or one little cube in the pack of 1,000.

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### The supermarket figurine @ 1:1,000 scale by volume (and, assuming, weight too) would weight 83 gm ( 3 ounces) for men and 70 gm (2.5 ounces) for women. That’s more like it. The figurines will be, in fact, a little heavier as customers will be scanned wearing clothes and shoes, we hope, or the scanning sessions at the supermarket will be really weird.

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# What next?

### How about your face on a Star Trek Figurine?

### Done. See Engadget.

### Yes, mathpiggies, we want maths to boldly go where no maths has gone before ……

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