Layout: Martine Dietrich, Berne
When images are created exactly where the backing paper is missing, then laser technology is at work.
The word “laser” is actually an English abbreviation for “light amplification by stimulated emission of radiation” – a phenomenon described by Albert Einstein as early as 1917.
A laser is light that is bundled into a beam and thus intensified. This monochromatic light has a high intensity and a narrow frequency, which enables laser beams to be used very precisely.
Lasers are very versatile and are used today in a wide variety of areas, from correcting visual impairments to the playing of storage media such as CDs and DVDs. They are familiar in industrial settings, too, for instance for cutting a variety of different materials.
Laser beams were also used in the miniature sheet “Laser cut”. The beams were created with a resonator that directed them into the machine’s cutting head via a mirror. When the laser beam strikes it, the paper burns, which is why light brown discolourations are sometimes visible on the back of the sheet.
Product Manager, Stamps & Philately