Soursop Fresh-to-Dry Ratio for Freeze-Dried Product
Freeze-dried soursop buyers should not compare suppliers using a single conversion number unless the basis is clear. A ratio from whole fruit, cleaned pulp, selected pulp, or final powder does not mean the same thing. Soursop contains skin, core, many seeds and high-moisture pulp, so the final yield depends on maturity, trimming, seed removal, format, drying loss and final moisture.
The practical operating ratio for FruitBuys freeze-dried soursop is about 6–7 kg cleaned pulp for 1 kg finished product. That number applies to edible pulp after peel, core and seed removal. Whole-fruit procurement requires a separate planning basis. FruitBuys Vietnam uses conversion data as part of Raw Material Sourcing Governance, Quality Control and sample-to-bulk approval, not as a loose supplier claim.
Direct Conversion Ratio for Freeze-Dried Soursop
The practical conversion ratio is about 6–7 kg cleaned soursop pulp for 1 kg freeze-dried soursop.
This ratio starts from edible pulp after peel, core and seed removal, not from whole fruit.
Buyers should confirm the ratio basis before using it for sourcing or supplier comparison.
The correct operating statement is:
6–7 kg cleaned soursop pulp → 1 kg freeze-dried soursopThis means the fruit has already passed the preparation stage. The peel, core and seeds have been removed. The remaining material is the edible pulp that moves into cutting, freezing and freeze-drying.
Do not use the same number for whole fruit. Whole-fruit planning must include peel, core, seeds, rejected fruit, trimming loss and pulp recovery. If a buyer confuses cleaned-pulp ratio with whole-fruit ratio, the procurement plan becomes distorted before production starts.
FruitBuys connects this ratio to the full freeze-dried soursop B2B specification guide. The pillar guide should summarize the number. This article owns the calculation logic.
Why Soursop Needs a High Fresh-to-Dry Ratio
Soursop pulp carries high natural water content. A 2026 review of soursop composition reports that soursop pulp contains high amounts of water, commonly in the 76–83% range. (Springer) That moisture must leave the product during freeze-drying.
When a fruit pulp contains that much water, the finished dry weight cannot stay close to the fresh weight. The process removes water while preserving the fruit structure as much as the selected format allows. The buyer should expect a high fresh-to-dry ratio, not treat it as inefficiency.
A simple material-balance view explains the logic:
| Item | Meaning |
|---|---|
| Fresh cleaned pulp | Starting material after peel, core and seed removal |
| Natural water | Main weight removed during drying |
| Fruit solids | Sugars, fiber, acids, minerals and other solids that remain |
| Final moisture | Residual water after drying |
| Process loss | Trimming, fines, product sticking, breakage and sorting loss |
Freeze-drying reviews describe process stages and show that freeze-drying conditions affect structural properties, porosity, color and texture of dried food materials. (PubMed Central (PMC)) That means the ratio is not only a water-removal calculation. The process and format also affect usable finished output.
Mass-Balance Calculation
A theoretical ratio comes from the difference between fresh-pulp moisture and finished-product moisture.
The practical ratio becomes higher after trimming, seed separation, fines and process loss.
Buyers should ask for both the calculation basis and the lot yield record.
Use the following formula for cleaned-pulp conversion:
Fresh pulp ratio = (1 - final moisture) ÷ (1 - fresh pulp moisture) × process-loss adjustmentA practical example:
| Input | Value |
|---|---|
| Fresh pulp moisture | 82% |
| Finished moisture | 4% |
| Dry solids in fresh pulp | 18% |
| Dry solids in finished product | 96% |
| Theoretical cleaned-pulp ratio before process loss | 5.33:1 |
That theoretical figure assumes no trimming loss, no seed-related pulp loss, no product sticking, no undersized removal and no reject material. Real production does not work that way.
When process loss is included, the operating range moves into:
6–7 kg cleaned pulp → 1 kg freeze-dried product
The buyer should use this as a planning range, not as an unconditional promise. The actual lot ratio depends on raw-material condition and finished-product release criteria.
Scenario Matrix for Cleaned-Pulp Conversion
| Fresh Pulp Moisture | Final Moisture | Process Loss Condition | Practical Ratio |
|---|---|---|---|
| 80% | 5% | Low loss | Around 5.5–6.0:1 |
| 81% | 4% | Normal loss | Around 5.8–6.3:1 |
| 82% | 4% | Normal loss | Around 6.0–6.6:1 |
| 83% | 4% | Higher loss | Around 6.5–7.2:1 |
| 83% | 3% | Higher loss and stricter release | Around 6.8–7.5:1 |
The matrix gives a planning view. It does not replace actual lot data. A lot with higher water content, more trimming, stricter size grading or higher fines removal will need more cleaned pulp per kilogram of released finished product.
FruitBuys links the final calculation to freeze-dried soursop moisture and water activity control. Final moisture and Aw must match the release specification before the finished weight can count as commercial output.
Cleaned Pulp Ratio vs Whole-Fruit Procurement Ratio
A buyer must separate two ratios:
Cleaned pulp ratio:
6–7 kg cleaned pulp → 1 kg freeze-dried productWhole-fruit planning ratio:
whole fruit required before peel, core, seed removal, rejection and trimmingSoursop fruit includes pulp, skin and seeds as separate fractions. The 2026 review describes the fruit as consisting of skin, pulp and seed, which supports separating edible pulp calculations from whole-fruit procurement planning. (Springer)
Whole-fruit planning can move into a wider range because the buyer must account for:
- Peel and outer skin
- Core
- Seed load
- Over-soft fruit
- Damaged fruit
- Trimming
- Pulp left around seeds
- Fruit rejected at intake
- Format-specific grading
For practical sourcing work, FruitBuys treats 6–7:1 as the cleaned-pulp operating ratio. Whole-fruit planning must be built from intake data, not copied from the cleaned-pulp ratio. The intake logic belongs in Vietnam soursop origin and maturity control. That article explains why maturity, fruit condition and sourcing route change recovery.
What Changes the Conversion Ratio?
The conversion ratio changes whenever raw material, process or specification changes. Buyers should not accept a ratio without asking what changed behind it.
1. Fruit Maturity
Maturity affects firmness, aroma, pulp separation and cutting behavior. Over-soft fruit can increase pulp loss during peel and seed removal. Under-mature fruit may reduce flavor development and still create sorting loss.
Buyer action: connect yield review to Vietnam soursop maturity control.
2. Seed Load
Soursop contains many seeds. Higher seed load reduces usable pulp recovery and increases labor at preparation. Poor seed separation can also create physical-defect risk.
Buyer action: review soursop seed-removal and foreign-material control before approving yield claims.
3. Cutting Format
Half-moon slices, cubes, chunks, crumble and powder do not create identical process loss. Slices may produce edge breakage. Cubes require size trimming. Crumble needs particle-range control. Powder may lose material during milling and sieving.
Buyer action: define the format through freeze-dried soursop formats and size selection.
4. Final Moisture Target
A stricter final moisture target can reduce finished weight. The same fresh pulp quantity may produce less released product if the buyer requires a lower final moisture range.
Buyer action: confirm final moisture and Aw through freeze-dried soursop water activity specification.
5. Process Loss
Process loss includes pulp smear, product sticking, broken pieces, fines, rework, rejected pieces and sorting after drying. Freeze-drying process conditions can affect physical properties of food materials, including texture and structure, so process control matters for usable yield. (PubMed Central (PMC))
Buyer action: review the full freeze-dried soursop process flow.
Why a Low Claimed Ratio Can Mislead Buyers
A low ratio can look attractive, but it can hide weak definitions. The buyer should investigate before accepting it.
Common problems include:
| Low-Ratio Claim | What May Be Missing |
|---|---|
| “5 kg makes 1 kg” | May exclude trimming, seed removal or rejected fruit |
| “Whole fruit ratio” | May actually mean selected pulp |
| “Finished weight” | May include higher final moisture |
| “Powder yield” | May exclude milling or sieving loss |
| “Sample yield” | May use hand-selected fruit and small-batch handling |
| “Factory average” | May not apply to buyer’s format or specification |
The buyer should ask one direct question:
Does this ratio start from whole fruit, cleaned pulp, or selected pulp after trimming?If the supplier cannot answer, the ratio has little value. FruitBuys uses yield data inside a controlled product route. The ratio must connect to raw-material intake, format specification, moisture, Aw, finished inspection and documentation. It should not stand alone as a marketing number.
How Format Changes Yield
Format selection affects usable output. A buyer should not expect the same yield across all formats.
| Format | Yield Pressure | Buyer Control Point |
|---|---|---|
| Half-moon slice | Edge breakage and visual rejection | Thickness, color, breakage limit |
| Cube | Trimming and size grading | Nominal size and tolerance |
| Chunk | Mixed shape and drying uniformity | Minimum and maximum piece size |
| Crumble | Particle range and fines | Screen range and dust limit |
| Powder | Milling, sieving and caking risk | Mesh, flowability and packaging |
A format with stricter appearance criteria may produce higher sorting loss. A powder with tight mesh control may lose material during sieving. A snack-format slice may need more careful handling and packaging to protect structure. The buyer should not compare a powder yield with a slice yield. Those are different commercial products with different release criteria.
Yield Records Buyers Should Request
A yield claim becomes useful only when it links to records. The buyer should request a yield file that shows the material flow from intake to release.
| Record | Required Purpose |
|---|---|
| Whole fruit intake weight | Establishes starting supply basis |
| Fruit rejection weight | Shows sorting loss |
| Cleaned pulp weight | Establishes edible-pulp basis |
| Peel, core and seed loss | Separates non-target material |
| Format target | Connects yield to product form |
| Pre-freezing weight | Shows material entering the dryer |
| Finished dry weight | Shows released output before packing |
| Moisture result | Confirms weight is not inflated by residual water |
| Aw result | Confirms available-water release |
| Fines / undersize | Shows grading loss |
| Retained sample | Supports sample-to-bulk comparison |
| Lot code | Links yield to COA and shipment record |
These records protect the buyer from comparing a clean-pulp ratio against a whole-fruit ratio. They also protect FruitBuys from vague supplier claims inside the supply chain. The record path should connect to freeze-dried soursop COA and laboratory testing and freeze-dried soursop sample-to-bulk approval.
Application Mapping
| Buyer Type | Application | Required Format | Proof Needed | FruitBuys Delivery |
|---|---|---|---|---|
| Importer | Bulk freeze-dried soursop distribution | Cubes, chunks or powder | Cleaned-pulp ratio, finished moisture, Aw and lot yield file | Raw Material Sourcing Governance and Documentation |
| Procurement manager | Supplier comparison | Buyer-defined format | Ratio basis: whole fruit vs cleaned pulp | Quality Control and Documentation |
| QA manager | Lot release | Buyer-defined format | Moisture, Aw, defect limits and retained sample | Quality Control |
| Private-label snack brand | Retail snack SKU | Half-moon slices or chunks | Visual standard, breakage and yield impact | OEM/Private Label Delivery |
| Cereal manufacturer | Fruit inclusion | Cubes or crumble | Size tolerance, fines and ratio by format | Quality Control |
| Beverage developer | Powder system | Powder | Mesh, milling loss, caking review and ingredient declaration | Documentation and Market Trial Support |
| R&D developer | Pilot application | Trial format | Sample yield, sensory result and process notes | MOQ Flexibility/Market Trial Support |
Highest-Risk Decision: Using a Ratio Without Its Basis
The highest-risk shortcut is accepting a conversion ratio without knowing whether it starts from whole fruit or cleaned pulp.
That error can distort sourcing plans, supplier comparison, sample approval and bulk-release expectations.
Buyers should request the ratio basis, moisture target and yield record before using the number.
A buyer may see one supplier claim a lower ratio and assume better efficiency. That assumption can fail. The lower ratio may use selected pulp, higher residual moisture, less strict visual sorting or a different format. It may also come from a small sample batch that does not represent bulk production.
The ratio must answer four questions:
- What material entered the calculation?
- What product format came out?
- What final moisture and Aw did the product meet?
- What losses were excluded or included?
Without those answers, the number does not support procurement or QA. FruitBuys treats ratio data as part of the buyer approval file. The ratio must connect to specification, process, COA scope, retained sample and bulk-release criteria. Buyers should structure that requirement in the freeze-dried soursop RFQ checklist.
Why FruitBuys Delivers This
FruitBuys Vietnam supplies export-ready freeze-dried soursop through an integrated product supply model. The buyer receives one configured product, one approved specification and one accountable supplier relationship.
Raw Material Sourcing Governance controls the starting point. FruitBuys aligns sourcing route, maturity, intake condition and cleaned-pulp recovery with the buyer’s intended format.
Quality Control protects the ratio from becoming a loose claim. FruitBuys connects yield to format, moisture, Aw, seed-removal control, fines and release criteria.
Documentation makes the ratio reviewable. FruitBuys aligns intake records, cleaned-pulp weight, finished weight, moisture result, Aw result, lot identity and retained samples where required.
MOQ Flexibility/Market Trial Support helps buyers test the selected format before scaling, where operationally supported. A trial ratio should not replace commercial-lot approval. It should define what must repeat.
Buyer Checklist
Before using a fresh-to-dry ratio for freeze-dried soursop, request:
- Ratio basis: whole fruit, cleaned pulp or selected pulp
- Botanical identity: Annona muricata L.
- Ingredient definition: pulp after peel, core and seed removal
- Origin and maturity condition
- Fruit rejection record
- Cleaned pulp weight
- Seed and peel loss
- Target format
- Cut size or mesh
- Pre-freezing weight
- Finished dry weight
- Final moisture result
- Final Aw result
- Fines or undersize record
- Defect limit
- Retained sample
- Lot code
- COA scope
- Change-control trigger for origin, format, process or packaging
Do not use a conversion ratio if the supplier cannot state its starting material and release condition.
Summary
Freeze-dried soursop uses about 6–7 kg cleaned soursop pulp to make 1 kg finished freeze-dried product. This ratio applies to edible pulp after peel, core and seed removal, not whole fruit.
The practical ratio depends on pulp moisture, final moisture, seed load, maturity, trimming, format, fines and process loss. FruitBuys Vietnam uses the ratio as part of Raw Material Sourcing Governance, Quality Control, Documentation and sample-to-bulk approval.
FAQ
How much fresh soursop makes 1 kg freeze-dried soursop?
Use about 6–7 kg cleaned soursop pulp for 1 kg freeze-dried soursop. This starts from edible pulp after peel, core and seed removal.
Is the ratio based on whole fruit?
No. The 6–7:1 ratio applies to cleaned pulp. Whole-fruit planning requires a wider basis because peel, core, seeds, trimming and fruit rejection must be included.
Why does soursop need so much fresh pulp?
Soursop pulp contains high natural water content. Freeze-drying removes most of that water, then additional losses come from trimming, seed removal, fines and process handling.
Does powder use the same ratio as slices?
Not always. Powder may include milling and sieving loss, while slices may lose weight through breakage and visual sorting. Each format needs its own yield review.
Can a supplier quote a lower ratio?
A supplier can quote a lower number, but the buyer must check the basis. It may exclude rejected fruit, use selected pulp, or reflect a different moisture target.
Which data should buyers request?
Request whole fruit weight, cleaned pulp weight, finished weight, moisture, Aw, format, fines, defect limits, retained sample and lot code.
What is the first buyer action?
Confirm the required format and final moisture target before requesting a yield-based supply plan.
Conclusion
Submit the required freeze-dried soursop format and final moisture target before requesting a yield-based supply plan.
References
- Igiehon, O.O., Idowu, A.T., Toluwabori, S. “Soursop (Annona muricata) Nutritional Composition, Bioactivities and its Potential Applications: A Review.” Waste and Biomass Valorization, 2026. (Springer)
- Nowak, D., Jakubczyk, E. “The Freeze-Drying of Foods — The Characteristic of the Process Course and the Effect of Its Parameters on the Physical Properties of Food Materials.” Foods, 2020. (PubMed Central (PMC))
- U.S. Food and Drug Administration. “Water Activity (aw) in Foods.” FDA Inspection Technical Guide. (FoodData Central)
