• Marking and coding inks
• Plastic bonded dispersion paints

Codes regarding production, date, batch number etc. are often printed on packages resp. stickers. This is done with special coding or marking inks, which must have a number of special characteristics. Basically there are two types of coding inks. Depending on the surface on which you print, either solvent or water based inks are used. Due to the printing speed the inks have to dry quickly and must be very mobile. The contained pigments must already be in a finest ground state, if possible in the range of 1 micron or even finer, in order to avoid a blocking of the ink jet nozzle.

1. Coding inks are generally produced in batches., not regarding whether the basis, i.e. the continuous phase, is a solvent or water. Since the solids, like pigments and maybe also the polymer, are already finest ground and available in form of agglomerates, the dispersing process only disagglomerates and homogenizes. This process is effected on the one hand in the shear gap between rotor and stator and on the other hand by producing massive turbulences at the outlet slots of the stator.
2. As for all dispersing processes care has to be taken for a temperature limitation, especially when using solvents, i.e. that double jacketed vessels should be used and maybe also stirrers that can be cooled like in the IKA® Master Plant. This plant also enables a submerse feeding of pigments, resins and predispersed solids directly into the mixing chamber of the dispersing machine.
3. In case the pigment agglomerates are extremely stable, an IKA® colloid mill MK 2000 can be incorporated at the bottom of the mixing vessel instead of the DBI 2000.
   

• Water
• Fillers, e.g. CaCO3
• Cellulose, e.g. CMC
• Binders PV
• Additives, e.g. TiO2 and
• Pigments

1. Forced by often change of colour and recipe, dispersion paints are still produced in traditional batch operation - except for big quantities.
2. Due to higher viscosities mainly batch dispersing machines of type ULTRA-TURRAX® with combination tools like TM-generators are used after the preparation of the premix.