Basic information regarding the printing on acetate using OrcoSperse™ aqueous pigments is shown below.  There are many parameters and variables involved with pigment printing.  Pigment printing concerns itself with the following basic factors:

Pigments

OrcoSperse™ pigments are aqueous pigments nonionically or anionically dispersed. These may or may not be resin bonded.

Low-Crock

A resinous material, usually acrylic or styrene butadiene latex which, in some cases, is compounded with a melamine formaldehyde resin to improve cross-linking and thus improving washfastness.

Clear Concentrate

A synthetic polymer dispersed in an emulsion or colloid which swells and increases in viscosity when dispersed in water usually with high shear mixers like a Barenco® or a Hill® homogenizer.

 

Pigment Printing Procedure:

1. Prepare typical print paste(100parts total) with the following:

• 1-8 parts       OrcoSperse™ pigment concentrate
• 1.5-2.5 parts  Orco Clear Conc SP-2™
• 5-10 parts     Orco Low-Crock T-550™
• X                   parts  Water

 

2. Charge tank as follows in order listed:

• X         parts           Cold Water
• 1.5-4.0 parts          Orco Clear Conc SP-2™

 

3. Run a high-speed mixer 10-12 minutes until smooth.
4. Add 5-10 parts Orco Low-Crock T-550™.
5. Add desired amount of OrcoSperse™ print paste prepared above and continue mixing for 4-8 minutes until dispersion is complete.
6. Check viscosity. If a higher viscosity is desired, add additional Orco Clear Conc SP-2™ with mixing for 5-7 minutes.
7. Print material on either a flat-bed screen or rotary screen.
8. Cure at a minimum of 275-300°F(135-150°C) for 60-90 seconds.

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