Using continuous spray inkjet system for accurately printing titanium oxide based inks

1. A method of producing an accurately positioned white layer to serve as an undercoat for inkjet process colors imaging on a substrate, comprising the steps of:

accurately ink jetting a colorless loosely-bonded frame onto the substrate, said frame defining an area to be imaged; and

ink jetting or spraying a white layer, said white layer at least partially overlapping said frame and said white layer covering said area defined by said frame.

2. The method of claim 1 , additionally comprising the step of drying said white layer.

3. The method of claim 2 , additionally comprising the step of removing said overlapping parts of said white layer and said frame.

4. The method of claim 3 , wherein said removing comprises rubbing or washing.

5. The method of claim 3 , additionally comprising the step of imaging said white layer with ink jet inks.

6. The method according to claim 1 , whereby the colorless ink is oil based.

7. Apparatus for producing an accurately positioned white layer to serve as an undercoat for inkjet process colors imaging on a substrate, comprising:

a first inkjet or inkjet array adapted for accurate printing; and

a second inkjet or spraying means,

wherein said first inkjet or inkjet array is operable to accurately ink jet a colorless loosely-bonded frame onto the substrate, said frame defining an area to be imaged; and

wherein said second inkjet or spraying means is operable to ink jet or spray a white layer, said white layer at least partially overlapping said frame and said white layer covering said area defined by said frame.

8. The apparatus of claim 7 , additionally comprising drying means.

9. The apparatus of claim 7 , additionally comprising rubbing or washing means.

10. The apparatus of claim 7 , wherein said first inkjet or inkjet array is additionally operable to inkjet an image onto said white layer.