Loose powder, and the sifter
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Static is a filling problem first
Fine pigment clings to the container wall, to the fitment and to hands, so it does not settle predictably and the fill varies. Filling by weight rather than by volume is the only way to keep a declared quantity honest.
And it is worse in dry air
Which is also when the product sells. A workshop in winter is the hardest filling environment, and it is worth knowing that the problem is seasonal rather than a process fault.
The sifter is doing real work
Without one, a jar of loose pigment is dispensed by tipping, which wastes product and makes the first use untidy. With one, the user takes a controlled amount onto a brush.
And we have one of them
A 43 mm natural PP spice sifter disc. It fits a 43 mm neck and four containers on this shelf are 43-400. If your product needs a sifter, that pairing is the whole option and it is better to know now.
Pigment settles and separates
A blend of colorants and fillers at different particle sizes and densities will stratify in transit. A customer seeing a lighter layer on top is seeing normal behavior, and saying so prevents the complaint.
Light matters for some pigments
13 amber and 4 black containers on this shelf against 12 clear. Clear sells a colorful product and amber protects a colorant that shifts, and that trade should be made deliberately.
Headspace and compaction
A part-filled jar lets powder move and compact in transit, so a jar sized to the fill arrives looking and behaving better. It also reduces the static-charged surface the powder can cling to.