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i found the following infos from Steven Thomas in the net: http://monopole.ph.qmw.ac.uk/~thomas/synthdiy/frontpanel.htm

TONER TRANSFER METHOD (DYNART PAPER)

DYNART™ paper has a special heat-proof coating that when used in either laser printers or photocopiers produces a copy of original artwork by fusing the toner to the top coating. The paper is pretty expensive. In the UK you can obtain it from Milford Instruments (its about 10 pounds for 5 sheets) and in America checkout the DynaArt website.

The idea then is to create a sort of large decal by lifting or transfering this image onto a carrier layer, which is created by spraying the surface of the paper with clear lacquer. After several layers of lacquer have been build up, the whole artwork is placed in water for 2-minutes. Since the toner/lacquer is waterproof, the backing paper loosens and then one can slide the whole artwork off and onto the front panel. The advantage of this over other methods (see below) is that the carrier layer can be made extrenely thin.

(perhaps 10 microns or so). The advantage of this is that when the decal™ is placed onto the fron panel and air bubbles have been removed by VERY CAREFUL BURNISHING OF THE TRANSFER (see below) the result can be really excellent..quite close to silk-screening. Because the carrier layer is so thin, it is more or less invisible and does not produce the distracting ”sheen” that e.g. legends produced from transparency acetate often suffer from. Also whilst it might seem that legend produced in this way might peel off in time, my experience has been that it is very syable. In fact when I was trying the paper early on I inevitably made mistakes and on one panel I had to remove the legend and start again. This was pretty difficult! I had to work quite hard with wirewool.

Advantages

• Can be used to make black or full colour front panel artwork
• Capable of excellent results on painted surfaces, giving silk-screen effect
• Good viewing angle of panel legend without troublesome ‘sheen’
• Once the decal is applied, and over-lacquered, the finish is very durable.
• Well what are the disadvantages? Here are a few which I have found

Dis-Advantages

• Decal produced are VERY fragile to handle and may break.
• Care must be taken when applying the lacquer layer to the paper, as bleeding’ of the toner can occur on fine
• legend.
• Ambient humidity/temperature can cause problems in that the decal can easily shrink if water is too hot.
• Equally I have found that too cold water can cause cracking of the decal