---
title: "How to Design a Potato Cleaning Sample Comparison Test"
url: https://www.spudmate.com/fr/potato-cleaning-sample-comparison/
description: "A controlled potato cleaning trial should compare like-for-like samples, not isolated machine impressions. This guide explains how to record crop…"
published: 2026-11-06
updated: 2026-11-06
author: "xtlaigc"
site: "Tianjin Goldilocks Co., Ltd."
---

# How to Design a Potato Cleaning Sample Comparison Test

## Key takeaways

- Compare matched crop portions from the same lot and document their starting condition.
- Judge cleaning against the intended downstream presentation, not appearance alone.
- Treat published capacity and footprint as planning facts, not trial acceptance guarantees.
- Record utilities, interruptions, operator observations and unresolved limitations.

## Define the operating problem before comparing cleaning methods

A potato cleaning sample comparison is useful only when it answers a defined operating question. “Which sample looks cleaner?” is too broad. The real question may be whether surface soil can be reduced before manual selection, whether outbound potatoes need a washed presentation, or whether the site should avoid adding a water-handling stage. These are different decisions, even when they use the same crop.

Start by describing the incoming material in practical terms: crop variety, size range, storage condition, visible soil, stones or plant residue, surface moisture and any handling damage already present. Record the intended downstream step as well. A dry-cleaned sample going to manual selection is not judged in the same way as a washed sample going to grading and bagging. Our [potato processing solutions overview](https://www.spudmate.com/#solutions) helps frame that wider line decision without treating one cleaning method as universally superior.

- State the cleaning decision the trial must support.
- Use material from the same lot for every comparison.
- Record the downstream presentation required by the buyer or operator.

## Match the samples and control the comparison conditions

The strongest comparison changes one major cleaning approach while keeping the crop basis as similar as possible. Divide a representative lot into matched portions, and identify each portion before processing. Do not compare freshly dug potatoes with stored potatoes, or a heavily soiled load with a lightly soiled one, unless the purpose is specifically to study crop variability.

Record the starting condition with photographs and a written observation sheet. Useful entries include the dominant soil type, whether soil is dry or adhering, the proportion of visible foreign material, wet patches, damaged tubers and the approximate size distribution. The record need not pretend to provide laboratory precision; its purpose is to explain why two samples may respond differently and to make a repeat trial possible.

- Assign a sample code before cleaning.
- Keep sample mass or container count consistent between runs.
- Use the same observation lighting and viewing distance after each run.
- Record stoppages, manual intervention and unusual feed conditions.

1. Match crop samples
2. Record starting condition
3. Run comparable cleaning trials
4. Assess downstream presentation

Conceptual workflow for a potato cleaning sample comparison, not a machine layout or scale drawing.

## Compare the mechanism, not only the final appearance

The dry option uses rotating brushes to remove surface soil while potatoes move forward continuously. Its long-board and short-board versions can operate alone or in a line, and the published application is dry cleaning before manual selection, grading or packing. This makes it a focused candidate when the operating problem is loose surface soil and the desired process remains dry.

The water-washing option combines cleaning with a broader outbound arrangement that includes soil handling, bubble washing, brush rollers, manual selection, lifting, mechanical sorting, conveying and bagging. Water changes the process question: the comparison must include water supply, utilities, drainage or recovery arrangements where applicable, space, handling after washing and the appearance required at dispatch. It is not enough to judge the tubers immediately after the wash.

For practical guidance on arranging dry cleaning with downstream handling, see our guide to [modular dry-cleaning potato lines](https://www.spudmate.com/dry-cleaning-potato-lines-modular-layout/). Cleaning performance and sorting performance remain separate questions, so a cleaning trial should not be treated as proof of sorting performance.

## Use the trial to choose a configuration and site direction

Configuration should follow the operating problem revealed by the samples. If the crop needs a dry surface-soil removal step before people inspect or grade it, a compact dry arrangement may be the more direct comparison. If the required presentation includes washing, sorting and bagging, the water-washing arrangement must be assessed as a process sequence rather than as a single cleaning action.

Footprint and connection requirements can decide the result before cleaning performance does. The dry machine is published in long-board and short-board versions, with a long-board size of 5300 × 1550 × 1350 mm and a short-board size of 3800 × 1550 × 1350 mm; its adjustable height is 1350-1700 mm. The water-washing solution states an approximate line length of 45 m and requires project-specific confirmation of water supply, utilities, layout and final capacity.

Use the [dry cleaning machine product information](https://www.spudmate.com/products/potato-dry-cleaning-machine/) and the [water-washing sorting solution description](https://www.spudmate.com/products/potato-water-washing-sorting-solution/) as starting points for the layout discussion, not as substitutes for a crop trial or site review.

[![Potato dry-cleaning machine for removing surface soil before downstream handling.](https://www.spudmate.com/wp-content/uploads/2026/10/spudmate-potato-dry-cleaning-machine-1024x512.jpg)](https://www.spudmate.com/products/potato-dry-cleaning-machine/)

Potato dry-cleaning machine: dry surface-soil removal before downstream handling.

[![Potato water-washing equipment for washing and downstream potato handling.](https://www.spudmate.com/wp-content/uploads/2026/10/spudmate-potato-water-washing-sorting-solution-1024x512.jpg)](https://www.spudmate.com/products/potato-water-washing-sorting-solution/)

Potato water-washing sorting solution: outbound washing and presentation route.

## Read the published differences without over-interpreting them

The comparison below separates verified product facts from conclusions that still require testing. A stated capacity is not an acceptance result, and a stated line length is not a complete layout. The values help define the trial envelope and the questions to ask when a proposed arrangement is reviewed.

In particular, a dry-cleaning capacity of 7-10 t/h should not be converted into a guaranteed cleaning rate for every crop condition. The water-washing solution is configured to project requirements, so its final capacity and component arrangement must be tied to the selected project. This distinction prevents a sample trial from being presented as a universal production guarantee.

| Comparison point | Dry-cleaning machine | Water-washing sorting solution | Meaning for the trial |
| --- | --- | --- | --- |
| Cleaning mechanism | Rotating brushes remove surface soil while potatoes move forward continuously. | The solution includes a cleaning machine, soil elevator, bubble washer and brush rollers. | Compare loose-soil removal separately from the effect of washing and the wider process route. |
| Published application | Dry cleaning before manual selection, grading or packing. | Outbound washing, sorting, grading and bagging. | Judge each sample against its intended downstream presentation. |
| Published scale information | 7-10 t/h; long-board and short-board versions can operate alone or in a line. | Configured to project requirements; approximate line length 45 m. | Use the values for initial planning, while confirming final capacity and site requirements for the project. |
| Configuration information | Long board 5300 × 1550 × 1350 mm; short board 3800 × 1550 × 1350 mm; adjustable height 1350-1700 mm. | Water supply, utilities, layout and final capacity are configured for each project. | Check footprint and services before treating a sample result as a line recommendation. |

## Run a controlled trial from intake to downstream presentation

Begin with an empty-equipment check and confirm that the sample path is clear. Then run a small, identified portion before the main comparison. Observe feeding, transfer points, brush or washing contact, soil discharge, manual inspection access and the condition of the cleaned potatoes. Keep the operating settings and material observations in the same record so an appearance judgment can be traced to a process condition.

For each method, inspect at least three points: incoming sample, immediate cleaned output and the output after the intended next handling step. Record visible residual soil, foreign material separation, wetness or surface presentation, damaged tubers noticed during the run, and whether operators can make the required selection decision. If the end use is bagging, retain the sample until it has been viewed in the proposed package or presentation context.

Where the process includes sorting or bagging, record those stages rather than stopping at the cleaner discharge. The useful question is whether the complete route supports the intended product presentation without creating an avoidable bottleneck, rehandling step or unclear reject stream.

- Use the same sample identification through every stage.
- Record start and stop times, interruptions and manual adjustments.
- Photograph comparable sample quantities, not isolated best-looking tubers.
- Separate observations from conclusions in the trial sheet.

| Trial stage | What to hold constant | What to observe | Decision value |
| --- | --- | --- | --- |
| Incoming sample | Lot identity, sample basis, viewing method | Soil condition, moisture, size range and visible foreign material | Shows whether later differences may come from unequal starting material. |
| Immediate cleaned output | Sample identification and observation quantity | Residual soil, separated impurities, wetness and visible damage | Shows the direct cleaning effect before later handling changes the appearance. |
| Downstream presentation | Intended selection, grading or packing route | Operator usability, presentation, reject handling and rehandling | Shows whether the method supports the actual commercial process. |
| Repeat observation | Same recording sheet and comparable crop condition | Repeatability, interruptions and sensitivity to crop variation | Prevents one favorable sample from becoming an unsupported acceptance claim. |

## Set acceptance criteria that reflect the buyer’s real decision

Acceptance should combine cleaning observations with operating practicality. Before the trial, agree which findings are mandatory, which are preferred and which are simply recorded for later design work. A buyer may require reduced visible soil before manual selection; another may require a washed, sorted and bagged presentation. The same numerical score cannot represent both objectives without a clear definition.

A useful acceptance record identifies the sample source, starting condition, selected configuration, operating period, output route, observed residual material, operator comments and unresolved limitations. It should also state whether the result applies only to the tested crop condition. If the trial uses unusually clean, dry or uniform potatoes, the result should not be presented as representative of every incoming load.

Limitations are part of the engineering answer. Water-based processing brings project requirements for water supply, utilities and layout. Dry brushing does not establish a washed appearance. Neither sample appearance nor a published capacity alone proves suitability for a complete line. For related considerations about washing, lifting and inspection, see the [water-wash potato line cleaning and inspection guide](https://www.spudmate.com/water-wash-potato-line-cleaning-lifting-inspection/).

## Turn the trial record into a project brief

After the comparison, convert observations into a short engineering brief: crop source and condition, target hourly flow, chosen cleaning route, required downstream steps, available footprint, utilities, operator involvement and acceptance method. Include photographs and the sample sheet, but also explain what the photographs cannot prove. This gives the next design discussion a usable boundary instead of a general preference for “dry” or “wet” cleaning.

We can then review whether the selected route should operate alone or as part of a line, how material should enter and leave the cleaning stage, and which project details still affect final configuration. The objective is not to force a result from a single test. It is to make the comparison repeatable enough that the equipment choice, site arrangement and acceptance discussion are based on the same operating problem.

## Plan a potato cleaning comparison with our engineers

[Send us your potato cleaning trial requirements](https://www.spudmate.com/#contact), including crop source and condition, sample size, target flow, preferred dry or water-based route, downstream selection or packing needs, available footprint, utilities, photographs and the acceptance observations you want recorded.