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Showing posts with label interesting. Show all posts
Showing posts with label interesting. Show all posts

Monday, November 26, 2007

Metal Pen


Grand Illusions Ltd. sells a pen that essentially never runs out of ink. This is because, although it may appear normal, the special writing utensil is a specially crafted shaft of metal. Here is the original story:
Metal Pen
A stainless steel pen, 8cm long. However when you unscrew the top, the 'nib' is a solid piece of metal. There is no ink, yet this pen will write on virtually any type of paper. This is what it looked like when we tried it on a piece of normal paper...



How does it work?

In the Medieval period, artists and scribes often used a metal stylus in order to draw on a specially prepared paper surface. Generally known as Metalpoint, or Silverpoint when the stylus was made of silver, artists such as Leonardo da Vinci, Dürer and Rembrandt all used this technique. http://www.silverpointweb.com/index.html gives a lot of information about how it works.

The pens we sell are a modern version (and do not use silver). The solid metal 'nib' consists of a metal alloy, that leaves a mark on most types of paper. If you use the sort of paper typically used in printers and photocopiers, the pen leaves a mark that looks as if it was made by a pencil. However the line will not smudge, and cannot be rubbed out.

Since there is no ink, there is nothing to dry out, so the pen will work just as well in 25 years time as it does today. And of course it never needs sharpening!

I would guess that in time the nib would begin to wear down, as you are leaving a small amount of metal on the page. However this has got to be a much slower process than with a pencil, which wears down pretty quickly.

If you are planning to write the definitive 21st century novel, I would recommend a regular pen. However as a scientific curiosity, we like this pen a lot.

The pen comes in a very smart, circular, silver colored metal presentation tin, and would make a very unusual gift.

The pen retails for $31.48 before tax.

Friday, November 16, 2007

Aliens!



A Nasa artist's impression of the 55 Cancri solar ystem
Aliens exist! View Story.

Saturday, November 10, 2007

Ultra-Short Pulse Lasers




Scientists at Johns Hopkins University have developed a laser that pulses in femtoseconds, or one millionth of a nanosecond. The laser can be customized to the resonant frequency of any bacteria or virus and will destroy any specific type of organisms in the body of the person it is pointed at. They are currently testing the laser on HIV and Hepatitis with positive results. Moreover, an FDA official estimated that ultra short-pulse lasers (USPs) could have hundreds of medical uses from laser eye treatments to destroying tumors cell-by-cell. USPs also appear to have no negative effect on human cells, although live trials are a long time away.

Full story can be found here