| abstract |
The present invention relates to a powder composition comprising a) alkali metal tungsten bronze, b) tungsten oxide, and c) particles of tungsten metal, a process for the preparation of the powder composition, , Or to increase the heat transfer of near infrared rays in a process selected from laser welding of plastic, near infrared curing of coating, drying of printing ink, fixing of ink toner to substrate, heating of plastic preform, laser marking of plastic or paper To the use of the powder composition. |