Understanding Mesh Size in Food Powders: A Practical Guide for Food Manufacturers
Purchase orders for dehydrated food powders routinely specify "fine powder" without any further detail. This is insufficient. Mesh size — the standardised measure of particle size — directly affects how your ingredient performs in your product: how quickly it dissolves, how intensely it colours a sauce, whether it is perceptible as texture, and how it handles on your production line. Getting the mesh specification right is a practical formulation decision, not an administrative one.
What Mesh Size Actually Means
Mesh size refers to the number of openings per linear inch in a woven wire sieve. A 40-mesh sieve has 40 openings per linear inch; a 100-mesh sieve has 100 openings per linear inch. Because the openings are smaller when there are more of them per inch, a higher mesh number always means a finer powder — more openings per inch means each opening is smaller, allowing only smaller particles to pass through.
When a supplier states that a product is "80 mesh," they mean that the powder has been sieved such that particles pass through an 80-mesh screen — i.e., all particles are smaller than the 80-mesh opening size. In practice, most commercial powders have a particle size distribution centred around the stated mesh size, with some variation above and below.
Higher mesh number = smaller opening = finer powder. Lower mesh number = larger opening = coarser granule. A 100 mesh powder is finer than a 40 mesh powder.
The Mesh Scale in Food Powders
The following reference covers the range commercially relevant for dehydrated food ingredient applications:
| Mesh Size | Opening Size | Visual/Tactile Character | Typical Applications |
|---|---|---|---|
| 20 mesh | ~850 µm | Coarse granules; visible particles | Visible inclusion in sauces, textured products |
| 40 mesh | ~425 µm | Medium powder; slightly grainy feel | Texture in soups, coarse seasonings, blends |
| 60 mesh | ~250 µm | Fine powder; smooth to the touch | Seasoning blends, dry rubs, bakery applications |
| 80 mesh | ~180 µm | Very fine; commercial standard | Most vegetable powders, sauces, soups, supplements |
| 100 mesh | ~150 µm | Extra fine; imperceptible texture | Instant noodles/soups, functional beverages, green powders |
| 200 mesh | ~75 µm | Ultra-fine; silk-like | Specialty pharmaceutical/cosmetic applications |
How Particle Size Affects Product Performance
Mesh size is not an incidental specification — it has direct and measurable consequences for how your ingredient behaves in your product and on your production line. The key performance dimensions are:
Flavour Release
Finer particles have greater total surface area per unit mass. This means volatile flavour compounds are exposed at the surface and released more quickly when the powder comes into contact with moisture, fat, or heat. A 100-mesh onion powder will deliver an immediate, intense flavour impact; a 40-mesh granule of the same product will release flavour more gradually as it hydrates and breaks down.
The higher surface area of fine powders also means that volatiles are lost faster during storage. An 80-mesh powder will lose its characteristic aroma more quickly than a 40-mesh granule of the same product stored under identical conditions. For aromatics like garlic, onion, and fenugreek, this is a meaningful shelf life consideration — not just a quality note.
Colour Dispersal
For colour-forward applications — tomato powders in pasta sauces, spinach or moringa powders in green beverages, turmeric in spice blends — finer particles disperse more evenly and produce more uniform colour throughout the product matrix. Coarser particles may create uneven colour distribution, visible specking, or streaking in finished products that require visual uniformity.
For applications where visible speckling of colour is a desirable textural or visual element — artisan soups, premium sauces, visible seasoning blends — a coarser 20–40-mesh particle is the correct specification.
Dissolution and Hydration Rate
In instant applications — instant soup sachets, seasoning powders that are added to boiling water, functional beverage powders — the time it takes the powder to fully hydrate and disperse is a critical end-user quality parameter. Finer powders (80–100 mesh) hydrate significantly faster than coarser particles. In instant noodle seasoning applications, a poorly specified coarser powder may leave undissolved particles visible in the broth — an immediate product failure signal.
Mouthfeel and Texture
Particles above approximately 100–150 microns are perceptible as grit or texture on the human palate. In applications where an invisible powder is required — smooth beverages, clear soups, uniform sauces — particles above this threshold create a perceptible, unwanted graininess. In applications where some mouthfeel is desirable — thick textured soups, rustic seasoning blends, coarse-ground spice mixes — a 40–60 mesh specification deliberately uses this effect.
Production Line Handling and Dustiness
Finer powders — particularly below 100 mesh — are significantly more dusty than coarser grades. Dust creates occupational health exposure risks, cleaning burden, product loss through airborne carry-off, and potential explosive dust hazards in large-volume handling environments. Production environments handling ultra-fine powders routinely require enclosed handling systems, dust extraction, and specialised dosing equipment.
Before specifying a finer mesh than your application genuinely requires, assess whether your production environment is equipped for it. In many cases, the practical handling difficulties of a 100-mesh powder outweigh the marginal dissolution improvement over an 80-mesh specification.
Application-Specific Mesh Recommendations
The Additive-Free Constraint at Ultra-Fine Mesh
There is a practical complication for buyers sourcing ultra-fine powders (200+ mesh) without additives: at very fine particle sizes, the extremely high surface area makes powders almost impossible to keep free-flowing without anti-caking agents. A 200-mesh naturally dehydrated vegetable powder has so much exposed surface area that it begins absorbing atmospheric moisture almost immediately on contact with normal warehouse air conditions, causing rapid clumping that can make the product unusable within days if packaging is not absolutely perfect.
This is why ultra-fine (200+ mesh) powders from many suppliers contain anti-caking agents — silicon dioxide, calcium silicate, or tricalcium phosphate — even when the supplier describes the product as "natural." The anti-caking agent is not always declared on the product name, but it will appear in the ingredient list if the supplier is compliant with labelling regulations.
If you require genuinely additive-free powder at finer mesh sizes, the correct approach is to specify 80–100 mesh (which is achievable without additives with proper moisture and packaging control) and assess whether the additional fineness of 200 mesh is genuinely necessary for your application. In the vast majority of food manufacturing applications, 80–100 mesh provides all the functionality of finer grades without the additive requirement.
How to Specify Mesh in Your Purchase Order
Vague terms like "fine powder," "ground," or "milled" are technically meaningless in a purchase specification. Different suppliers will interpret them differently, and you have no contractual basis for rejection if the delivered product does not perform as expected.
The correct approach is to specify mesh size as a sieve pass specification — for example, "100% passing 80 mesh (180 µm)" or, if you want tighter distribution control, a dual specification such as "100% passing 80 mesh, maximum 10% retained on 100 mesh." This gives both you and your supplier a clear, testable acceptance criterion.
- 1.State mesh size numerically — e.g. "80 mesh" — not descriptively ("fine").
- 2.Express it as a pass specification: "100% passing 80 mesh" means all particles are smaller than 180 µm.
- 3.For tighter distribution, add a retained specification: "maximum 5% retained on 60 mesh."
- 4.Request that mesh/particle size appear on the COA as a tested parameter, not just a stated parameter.
- 5.Ask: "Do you use any anti-caking agent to achieve this mesh size?" — the correct answer for additive-free supply is no.
Atlas AgroFood: Standard and Custom Mesh, No Additives
Atlas AgroFood's standard range of dehydrated vegetable powders is produced at 80–100 mesh — the commercial optimum for the majority of food manufacturing applications. Custom mesh specifications are available on request, subject to minimum order quantities.
Critically, we do not use anti-caking agents, flow aids, or any other additives regardless of the mesh size specified. Our ability to produce clean powders at fine mesh without additives is a function of drying process control and packaging — not chemical flow aids. If you are sourcing at a mesh finer than 80 and your current supplier is unable to confirm they are additive-free, this is worth investigating before your next order.
Contact us to discuss your mesh specification requirements, request samples at different mesh grades, or review our standard product COAs.
Need a Specific Mesh Specification?
Atlas AgroFood supplies dehydrated vegetable powders at 80–100 mesh as standard, with custom mesh available on request — no anti-caking agents, no flow aids, ever. Contact us to discuss your specification or request samples.