Claims
- 1. A magnetic dispension medium, comprising
a bulk material, a first colorant, a second colorant, a thickener, and a magnetic material.
- 2. The magnetic dispension material of claim 1, wherein said bulk material is liquid paraffin.
- 3. The magnetic dispension material of claim 1, wherein said thickener is silica.
- 4. The magnetic dispension material of claim 1, wherein said magnetic material is iron powder.
- 5. The magnetic dispension material of claim 4, wherein said iron powder contains up to 17 percent manganese.
- 6. The magnetic dispension material of claim 4, wherein said iron powder has particles less than 100 microns in diameter.
- 7. The magnetic dispension material of claim 1, wherein said first colorant is titanium dioxide.
- 8. The magnetic dispension material of claim 1, wherein said second colorant is benzo oxazole fluorescent whitener.
- 9. The magnetic dispension material of claim 1, wherein said first colorant is titanium dioxide and said second colorant is benzo oxazole fluorescent whitener.
- 10. A magnetic dispension medium, comprising
a bulk material, a colorant, said colorant being benzo oxazole fluorescent whitener, a thickener, and a magnetic material.
- 11. The magnetic dispersion medium of claim 10, wherein
said bulk material is liquid paraffin, said thickener is silica, and said magnetic material is iron powder.
Parent Case Info
[0001] This application claims the benefit of U.S. provisional patent application Serial No. 60/289,798, filed May 10, 2001.
Provisional Applications (1)
|
Number |
Date |
Country |
|
60289798 |
May 2001 |
US |