I'm having some issues with some pigment agglomeration in a hot pour product. I'm using lecithin coated pigments. There are little speckles of coated TiO2 (and just TiO2, no iron oxides) throughout the cooled product. I'm using both Finsolv TN (wetter) and Cithrol PG23IS (disperser) and I noticed significantly less speckling after the addition of both, but it still remains. Finsolv is in at 5% and the Cithrol is in at 2%. Product is poured just above set temperature.
For proper pigment wetting do you mix pigments with the wetter and then introduce the rest of the product into the pre-wet pigments and disperse, or is adding the pigment wetter to the overall mixture and then dispersing pigments with IKA enough?
While during my searching I found a lot of stuff about why you should wet pigments but not the *how*.
I know I'm asking a lot of questions and I appreciate all you guys' help.