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Can’t get rid of bubbling on anhydrous hot pours
Hi!
Working on a foundation stick using a predispersed pigment blend from KOBO, but because they still aren’t finely enough dispersed, I run them through a triple mill roller along with my powder phase to make a uniform paste. The trouble is, no matter how I try this, no matter what ingredients I use, no matter what sort of mixing I do (center stand propeller fully submerged with no air being added in, hand blender fully submerged, hand mixing with spatula, etc.) these bubbles pop up to the surface that do not dissipate on their own and getting rid of 1 causes 5 more to pop up.
At first I thought it may be the silica in the predispersions, but I made my own dispersion with my triple mill roll using just sunflower oil and pigments and there issue persisted.
Help!
Here are the ingredients I’m using btw:
sunflower oil
rice bran wax
carnauba wax
c13-15 alkane
tocopherol
boron nitride
silica, dimethicone/vinyl dimethicone crosspolymer
KOBO hydrophilic pigments (I’ve tried the predispersion in jojoba oil and polyglyceryl-6 polyricinoleate, plain oxides treated with magnesium myristate, etc.) -
6 Replies
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Here’s an example.
mple. -
I suppose I have to continue under the assumption that somewhere air is getting into the formula while mixing and causing bubbles, so my question is if anybody knows a way to fix the bubbles once they appear? Thanks!
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Prop mixers in general easily incorporate air, if you want to try switching to a different blade style you made find a cowles or jiffy blade works better for your system. Other tips and tricks include: moving mixer slightly off center from your batch, and periodically stopping mixing to let some larger air bubbles rise to the top (I’ve heard it called ‘burping’ the batch- when you restart do it at a lower speed if you do see some air come up). When you do the final pour how high do you heat? Are you noticing these bubbles even when the stick solidifies?
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Ever try Antifoam? This is simethicone and quite miscible with your formula.
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I’ve tried varying final pour temps - ranging from 85*C to 110*C. I do notice bubbling in the solidifed stick. Thoughts?
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@chemicalmatt
No, I haven’t - well, except for using simethicone drops for my baby’s tummy! Will look into it for this.
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