Using a quick rheological screening test I had developed in another project, we identified a new additive, not on the market as a dispersant, that was cheap, safe and readily available. The work was done in just a month and on a tight budget.
In a full-scale factory trial they found that the additive allowed them a 48 hour shutdown with no clogging. In fact, after 48 hours, the flow of the PVC plastisol was better than before the stoppage. The new additive was immediately implemented in production.