In short: Blend a small dose of flow-aid silica into the finished seasoning as the last step, then test caking the way the product fails in real life: warm, humid storage under the weight of a stacked pallet. Compare the treated and untreated blend by tipping the jar, not by feel. Sensilchem starts food-powder trials with CENSIL 260P and uses the porous grades CENSIL 310 and 320 when adsorption of moisture or oil is the problem rather than plain flow.
Add the flow aid to the finished blend and mix only long enough to distribute it. Over-mixing can break agglomerates in the seasoning and change how it flows for reasons unrelated to the silica.
Put the treated and untreated blends in the pouch or jar the product ships in. Caking depends on headspace, moisture barrier and pressure, so a laboratory beaker gives a false pass.
Stack the pouches under a weight and hold them warm in a humid cabinet for a week or more. This is the condition a pallet sees in a container and a warehouse in the tropics.
Open each pack and tip it onto a tray. A powder that pours has passed; one that comes out as a slab or needs shaking has caked. Photograph the tray — it is the clearest record for the customer.
Run the treated blend through the filler or a small hopper and watch for bridging and rat-holing. Flow in the pack and flow in the hopper are different properties and both matter.
Repeat at a lower dose once you have a pass. Flow aids are inert but they are also cost and label space, and the lowest effective dose is the one that survives the buyer's review.
Silica is tasteless and odourless at flow-aid doses. If a panel notices a difference, look first at changed dissolution speed or dust, not flavour.
Precipitated (CENSIL 260P) for dry blends that cake under pressure; porous (CENSIL 310 or 320) when the blend carries oil or a hygroscopic ingredient that needs to be taken up rather than coated.
The material you use now, the formulation or resin, the equipment and the target you need to hit. That is enough for us to say whether we have something worth testing.
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