Date recorded: October 21 2014

Duration: 54 minutes 34 seconds

Achieving product stability is a critical aspect of ink formulation. Modern inks are typically colloidal suspensions of multiple components in an organic or aqueous continuous phase. The functionality of the finished product relies on maintaining suspended ingredients in a dispersed state, for the life time of the ink, under all the conditions that will be encountered. In this webinar we discuss the key factors governing dispersion stability (resistance to aggregation and sedimentation) and the various options and tools available for enhancing and predicting it.

Table of contents
1. Welcome
02:04
2. How to Characterize and Optimize Inkjet Inks PART 2: Keeping you in suspense! Evaluating and improving dispersion stability
00:34
3. Contents
01:18
4. Dispersion/Suspension stability
01:37
5. How to achieve this?
01:12
6. Which method? ……….It depends!!
03:01
7. Colloidal stability
01:14
8. Colloidal stability and DLVO Theory
02:17
9. Colloidal stability by steric means
01:52
10. Examples
04:28
11. Advantages/Disadvantages
02:41
12. Case Study
01:08
13. Silica dispersion stability
00:44
14. Particle size and density
00:34
15. Force balance on particle
01:08
16. How to achieve this?
00:19
17. Effect of Viscosity (dilute systems)
01:24
18. Effect of Viscosity (concentrated systems)
01:33
19. Maintaining performance and functionality
01:28
20. Additives for increasing low shear Viscosity
01:04
21. Effect of zeta potential on low shear viscosity
01:02
22. How to achieve this?
00:39
23. Colloidal stability and DLVO theory
01:51
24. Forces in a stable dispersion
01:06
25. Zeta Potential
00:26
26. Rheology of dispersions at different pH
01:17
27. Yield Stress ramp test
01:27
28. Yield Stress
00:47
29. What Yield Stress is sufficient?
01:12
30. Does my sample have a yield stress?
00:12
31. Does my sample have a yield stress?
00:39
32. What Yield Stress is sufficient?
01:50
33. How to achieve this?
00:20
34. Summary – How to achieve stable dispersions
02:22
35. The End
00:14
36. Any Questions?
07:30