the usual manner at 170 180 u00b0 c in 8 12 seconds a pressure of about 310 kpa with respect to useful colour printers a rough distinction may be made between digitally controlled coluour printers working with powder toners liquid dyes or colour ribbons examples of colour copiers using powder toners in a dry electrostatic process include u201c canon u00ae clc 700 u201d u201c ricoh u00ae nc 5006 u201d and u201c rank xerox u00ae 5775 u201d examples of digitally controlled colour printers using liquid dyes include u201c indigo eprint 1000 u201d u201c ibm color jetprinter ps 4079 u201d and u201c canon u00ae bjc 880 u201d finally examples of digitally controlled so called thermotransfer colour printers working with colour ribbons include u201c abdick u201d u201c seiko u00ae colorpoint 2 psf 14 u201d and u201c fargo pictura 310 u201d each system has its cost quality parameters between which one may choose freely the elastomer layers encapsulating the colour layer may be adapted to the various printers e g by means of surface active additives or electronic surface treatment this applies to both water base and solvent based polymers if however liquid dyes are used waterproof dyes will always be preferred modern digitally controlled colour printers are compatible with a number of standard software editing programs e g windows 3 x ibm os 2 apple system 6 and 7 as well as the more advanced adobe postscript level 2 preferred polymers having a high plasticizing point for making the elastomer layers 4 6 and 7 are elastomeric polyurethanes such as a one component fully reacted linear polyurethane on the basis of polyester and aliphatic diisocyanate or a one component fully reacted polyurethane on the basis of polyester and aromatic diisocyanate the thermoplastic polymer for use in the.