Why RJS Uses Its Oil Settling Process: The Purpose Behind Cold-Pressed Oil Handling

When you open a bottle of cold-pressed oil, have you ever wondered why the oil is allowed to settle before it is packed?

Freshly extracted oil can contain fine suspended particles from the raw material and extraction process. How these particles are handled can influence the appearance and clarity of the finished oil.

At RJS Healthy Foods, settling is an important part of our traditional oil-handling approach. Rather than judging oil quality by appearance alone, we believe it is important to understand why each production step is performed.

In this article, we'll explain why settling matters, how it works, how it differs from filtration and what customers should know about the process.

1. Why Does Extracted Oil Need Further Handling?

The oil extraction process does not end when oil leaves the pressing machine.

During mechanical pressing, small particles from the raw material may enter the extracted oil. Depending on the oil type and production conditions, these particles can remain suspended or gradually settle over time.

Before packing, the oil needs suitable post-extraction handling.

This helps prepare the oil for the next production stages and allows the manufacturer to manage the product according to its intended quality requirements.

The specific handling method depends on the raw material, the extraction process and the manufacturer's procedures.

2. Why Does RJS Allow Oil to Settle?

At RJS, our general oil-handling approach includes allowing extracted oil to settle before further handling and packing.

Our described process uses sunlight settling for approximately 7–14 days, depending on the product and production conditions.

The main purpose of settling is to give heavier suspended particles time to move towards the bottom of the container under gravity.

This can help separate some settled material from the clearer portion of the oil.

Settling is not intended to prove that an oil is pure or safe simply because it looks clear. It is one part of the overall production and handling process.

3. How Does the Settling Process Work?

The process can be understood in three basic stages.

Stage 1: Collecting the Oil

After mechanical extraction, the oil is collected in suitable containers for post-extraction handling.

Stage 2: Allowing Time for Separation

The oil is left undisturbed under the conditions specified by the production process.

During this period, heavier suspended particles can gradually move towards the bottom.

Stage 3: Further Handling Before Packing

After settling, the oil is handled further according to the production procedure. Relevant checks are carried out before the product is packed.

The time needed for settling can vary according to the oil, particle size, temperature and other conditions. Not every particle will necessarily settle during this stage.

4. Why Is Settling Important for Oil Appearance?

One visible effect of settling is that the upper portion of the oil may become clearer as heavier particles move downwards.

However, not all oils look the same, and not every oil needs to have an identical appearance.

Groundnut oil, sesame oil and coconut oil have different natural characteristics. Their appearance can also be affected by raw material, filtration, temperature and storage.

For this reason, the goal should not be to make every oil look identical.

Clear oil is not automatically better, and cloudy oil is not automatically better.

Appearance is one observation, not a complete quality test.

5. Settling vs Filtration: What Is the Difference?

Settling and filtration can both help separate particles from oil, but they work differently.

Feature	Settling	Filtration
Principle	Particles move downwards under gravity	Oil passes through a suitable filtering medium
Main purpose	Allows heavier suspended particles to separate over time	Captures particles that the filter can retain
Equipment	Suitable settling containers or tanks	A suitable filter or filtration system
Time	Depends on the oil and settling conditions	Depends on the filter and operating conditions
Effect	The upper portion may become clearer	Can reduce particles retained by the filter
Limitation	Fine particles may remain suspended	Cannot remove every possible contaminant or establish overall quality by itself

These processes should not be treated as interchangeable.

RJS's general approach relies on sunlight settling for approximately 7–14 days rather than machine or flax filtration, according to the process details previously provided. The precise method should be confirmed for each product before making a product-specific claim.

6. Why Doesn't RJS Judge Oil Quality by Clarity Alone?

A bottle of oil can look clear without its appearance revealing every aspect of its quality.

Similarly, an oil that appears slightly cloudy is not automatically poor quality.

Clarity alone cannot tell you:

• Whether the raw material was suitable

• Whether the oil was stored properly

• Whether the product is authentic

• Whether it meets the relevant quality requirements

• Whether it has been handled hygienically

That is why oil quality should be considered through the complete manufacturing process, relevant testing, packaging and storage.

At RJS, the objective is to explain the production process accurately rather than use cloudiness or transparency as a marketing claim.

7. What Happens to the Sediment?

As the oil settles, heavier particles may accumulate at the bottom of the container.

This settled material is often called sediment.

The amount and composition can vary depending on the raw material and production process.

RJS has described the settled residue from its oil-handling process as kakko, which is directed towards cattle-feed use. Any such reuse should be subject to appropriate suitability and safety checks.

Sediment alone does not establish whether oil is good or bad. However, visible contamination, an unusual unpleasant smell, damaged packaging or other unexpected changes should not be ignored.

If you suspect a packaged oil has a quality problem, stop using it and contact the manufacturer or seller.

8. Does Settling Make Oil Safer?

Settling helps separate some suspended particles. It should not be treated as a complete food-safety process.

It does not independently establish that an oil is free from contaminants, that the raw material was suitable or that the finished product meets all applicable requirements.

Responsible oil production also depends on:

• Suitable raw materials

• Appropriate cleaning and preparation

• Hygienic manufacturing and handling

• Suitable storage conditions

• Relevant quality checks and testing

• Proper packaging

Each stage serves a different purpose. Settling is one part of this wider process, not a replacement for the others.

9. Why Does the Settling Period Matter?

Settling takes time because suspended particles do not all move downwards at the same rate.

The separation process can be influenced by particle size, the properties of the oil, temperature and other conditions.

RJS's general settling approach uses approximately 7–14 days, depending on the product and production conditions.

This should be understood as a working process description, not a universal requirement for every oil manufacturer or every type of oil.

The appropriate handling period should reflect the actual product and the manufacturer's established procedure.

10. What Should Customers Look for When Buying Cold-Pressed Oil?

When choosing cold-pressed oil, look beyond how transparent the bottle appears.

Check the raw material

Look for clear information about the oil's ingredients and source where available.

Understand the production process

Choose a manufacturer that explains its extraction and post-extraction handling accurately.

Read the label

Check ingredients, manufacturer details, batch information, dates and storage instructions.

Inspect the packaging

Make sure the seal is intact and the container is undamaged.

Check freshness and storage

Follow the recommended storage instructions and pay attention to unexpected changes in the product.

These steps provide a more useful basis for evaluating oil than relying on clarity or colour alone.

How RJS Approaches Oil Handling

At RJS Healthy Foods, our general oil production approach includes raw-material selection, cleaning, mechanical pressing, settling, relevant quality checks and packing.

Our described settling process uses sunlight settling for approximately 7–14 days, depending on the product and production conditions.

We believe that customers deserve a clear explanation of what happens to their oil before it reaches the bottle.

Traditional Process. Modern Quality.

Frequently Asked Questions

Why does RJS allow cold-pressed oil to settle?

Settling allows heavier suspended particles to move towards the bottom over time. This helps prepare the oil for further handling before packing.

How long does RJS allow oil to settle?

RJS's general approach uses sunlight settling for approximately 7–14 days, depending on the product and production conditions.

Is settling the same as filtration?

No. Settling relies on gravity, while filtration uses a suitable filtering medium to capture particles.

Does settling remove every particle from oil?

No. Some fine particles may remain suspended. Settling is one stage of oil handling, not a guarantee that every particle has been removed.

Does clear oil mean better quality?

Not automatically. Clarity alone cannot establish purity, authenticity, freshness or overall quality.

Is sediment in cold-pressed oil always a problem?

Not necessarily. Some suspended particles can settle over time. However, sediment alone cannot confirm that an oil is safe or unsafe. Consider the product's overall condition and contact the manufacturer if you have concerns.

Does settling replace quality testing?

No. Settling is a physical separation process. Appropriate quality checks and testing remain important.

How should I store cold-pressed oil?

Keep the container tightly closed, protect it from excessive heat and direct sunlight, and follow the storage instructions on the product label.

Explore RJS Cold-Pressed Oils

Understanding why oil is allowed to settle helps customers understand one part of the journey from raw material to finished bottle.

At RJS Healthy Foods, our aim is to explain our production approach and help customers make informed choices based on product information and appropriate quality practices.

Explore our range of groundnut, sesame, coconut and castor oils.

Traditional Process. Modern Quality.

Explore RJS Healthy Foods

Final Takeaway

RJS uses settling as part of its general oil-handling approach to allow heavier suspended particles to separate before further handling and packing.

The process can influence clarity, but it does not independently prove purity or safety.

The purpose is not simply to make oil look clear. It is to handle the extracted oil appropriately as part of the wider production process.