"mantinieri" <mantinieri@...> wrote: > > I have read your pdf note with interest. Good work! The final formula and PDF will change. That last-best mix failed the centrifuge test. Part of the balancing is clearly viscosity v. smoothness. The lower viscosity mixes allow a greater load with smoothness. But the settlement rate is too high. So, I'm back to balancing the ingredients at a high enough viscosity that I can live with the (still fast) settlement rate. The Dow surfactant is a significant ingredient, and I think a higher propylene glycol mix than the original C6 base (where it was in the Photo Flo) seems to help. How much is enough is uncertain. I'm pushing the glycerol content back up to hold the carbon pigments in suspension better, both due to its viscosity and higher specific gravity. Paul www.PaulRoark.com
Message
Re: Carbon-7
2009-10-04 by pr_roark