I want the printing to appear muted, so I went to a method I used a lot back before I invested in a huge selection of screen printing inks. I am using unscented shaving gel, which dispenses thick and foams up with stirring action. This mixes well with any type of paint. In this case, I am using Jacquard Lumiere. It gives a more subtle, less intense, less distinct print.
The other really nice benefit is that that screens wash out super easily because of the shaving cream in the printing mixture.