How RJS Produces Cold-Pressed Groundnut Oil: From Groundnuts to Your Kitchen

Groundnut oil is a familiar ingredient in many Indian kitchens, especially in traditional South Indian cooking. It is used in a variety of dishes because of its characteristic flavour and versatility.

But have you ever wondered how groundnuts become the oil in your bottle?

The process involves more than simply putting groundnuts into an oil press. Raw material selection, cleaning, moisture assessment, mechanical extraction, settling, quality checks and packaging all play important roles.

At RJS Healthy Foods, we believe customers should understand how their cooking oil is produced and what happens before it reaches their kitchen.

In this article, let's explore how cold-pressed groundnut oil is produced and the steps involved in the RJS manufacturing process.

1. Selecting Suitable Groundnuts

The production process begins with raw material selection.

Groundnuts can vary in quality depending on their variety, growing conditions, harvesting, drying and storage.

Before production, the incoming raw material needs to be assessed for suitability.

Important considerations include:

• Overall condition of the groundnuts

• Visible impurities and damaged material

• Moisture content

• Signs of unsuitable storage

• Other quality concerns that may require further assessment

At RJS, raw material selection is an important part of preparing groundnuts for oil production.

Good raw material is an essential starting point, although the final quality of the oil also depends on processing, handling and storage.

2. Inspecting and Sampling the Raw Material

A batch of groundnuts should not be judged only by looking at a single handful.

The condition of the material can vary across bags or different portions of a delivery.

Representative sampling helps provide a better understanding of the incoming lot.

The sample can be inspected for visible impurities, damaged groundnuts and other concerns. Where necessary, additional testing can help assess parameters that cannot be established through visual inspection alone.

At RJS, the described raw material quality workflow includes sampling, inspection and relevant quality assessment before production decisions.

The purpose is to make a more informed decision about the material entering the oil mill.

3. Checking Moisture Content

Moisture is an important consideration when handling and storing groundnuts.

Excess moisture can increase the risk of deterioration during storage and may affect the suitability of the material for processing.

RJS's described raw material workflow includes moisture assessment using a moisture meter alongside other checks.

The appropriate moisture level depends on the condition of the groundnuts, storage history and production requirements.

Moisture assessment helps evaluate the material, but it does not replace other quality checks.

4. Cleaning the Groundnuts Before Pressing

Agricultural raw materials can contain stones, soil, dust, plant debris and other foreign matter.

These impurities should be identified and removed using suitable cleaning and handling practices before the groundnuts enter the extraction process.

Cleaning helps:

• Reduce unwanted physical material entering production

• Protect machinery from foreign objects

• Improve raw material handling

• Prepare the groundnuts for pressing

At RJS, inspection and impurity checks form part of raw material preparation.

Cleaning alone cannot establish that a batch is free from every possible contaminant, so other appropriate controls may also be necessary.

5. Mechanical Extraction: How Groundnuts Become Oil

After suitable inspection and preparation, the groundnuts move to the extraction stage.

Cold-pressed groundnut oil is obtained primarily through mechanical pressing rather than relying on solvent extraction as the main oil-recovery method.

During mechanical extraction, pressure is applied to the prepared groundnut material, allowing oil to be released and collected.

The extraction process also produces a solid by-product commonly known as groundnut oil cake.

Oil yield can vary depending on factors such as:

• Groundnut variety

• Raw material condition

• Moisture content

• Preparation method

• Press design and operating conditions

This is why the production process begins with raw material selection rather than assuming that every batch will behave identically.

6. Managing Heat During Extraction

The term cold-pressed generally refers to mechanical oil extraction carried out with limited heat exposure compared with processes involving more intensive heating or refining.

However, the exact temperature reached during pressing depends on the equipment, raw material and operating conditions.

Temperature management is therefore an important consideration when producing cold-pressed oils.

At RJS, the stated production approach for groundnut and sesame oil aims to keep processing below 50°C.

Actual process conditions should be monitored and managed appropriately because the term cold-pressed alone does not establish the exact temperature history of every batch.

The objective is to follow the intended extraction method while handling the raw material and oil carefully.

7. Settling the Extracted Groundnut Oil

Freshly extracted oil may contain fine suspended particles from the raw material.

After extraction, settling can allow some of these particles to gradually move toward the bottom of a suitable container.

The upper portion of the oil may become clearer as the heavier particles settle.

Settling time depends on factors such as particle size, temperature, oil characteristics and the handling process.

RJS's described process includes allowing extracted oil to settle in sunlight for approximately 7–14 days as part of its oil-handling approach.

The exact duration can depend on the product and process conditions.

Settling helps clarify the oil, but it should not be treated as a substitute for appropriate quality checks or as proof that the oil is free from every contaminant.

8. Quality Checks Before Packaging

Producing groundnut oil involves more than extraction and settling.

The finished product must also be handled, assessed and packaged appropriately.

Quality checks may address relevant characteristics such as:

• Appearance and clarity

• Aroma

• Signs of deterioration

• Applicable quality and safety parameters

• Packaging condition

The appropriate checks depend on the product specifications and applicable requirements.

Visual inspection can help identify certain concerns, but appearance alone cannot establish the complete quality or safety of groundnut oil.

At RJS, quality assessment is part of the broader journey from raw material selection to the finished product.

9. Packaging the Groundnut Oil

Once the oil has undergone the required processing and checks, it can be prepared for packaging.

Suitable packaging helps protect the product during storage, transportation and everyday use.

Before purchasing, customers should check:

• Whether the package is sealed and undamaged

• The product name and ingredient information

• Manufacturer details

• Batch information

• Manufacturing or packing date

• Best-before information

• Storage instructions

After opening, keep the bottle tightly closed and away from direct sunlight and excessive heat. Always follow the instructions on the product label.

Proper packaging and storage are important because oil quality can deteriorate over time when exposed to unsuitable conditions.

10. What Happens to the Groundnut Oil Cake?

Mechanical extraction also produces groundnut oil cake, the solid material left after much of the oil has been removed.

Oil cake may have uses as an agricultural or animal-feed ingredient, but its suitability depends on its composition, quality and intended application.

It should not automatically be assumed suitable for every use without the relevant assessment.

Making practical use of suitable by-products can help reduce waste and improve resource utilisation in oil production.

11. The RJS Cold-Pressed Groundnut Oil Process at a Glance

The process can be summarised in these stages:

Step 1: Raw Material Selection

Identify suitable groundnuts for the intended production process.

Step 2: Sampling and Inspection

Assess the incoming batch for visible concerns and relevant quality characteristics.

Step 3: Moisture Assessment

Check moisture content as part of raw material evaluation.

Step 4: Cleaning

Remove stones, soil and other unwanted physical material using suitable methods.

Step 5: Mechanical Pressing

Extract oil from the prepared groundnuts.

Step 6: Settling

Allow suitable time for suspended particles to settle.

Step 7: Quality Assessment

Carry out relevant checks before the oil is released for packaging.

Step 8: Packaging

Pack the product appropriately and provide the required label information.

Each stage serves a different purpose. Together, they form the wider manufacturing process.

12. Why Understanding the Production Process Matters

When choosing groundnut oil, customers often focus on colour, aroma, price or packaging.

These characteristics can be useful observations, but they do not explain the entire manufacturing process.

Understanding production helps customers ask better questions:

• Where did the raw material come from?

• How were the groundnuts inspected and cleaned?

• How was the oil extracted?

• How was the oil handled after pressing?

• What quality checks were carried out?

• How was the product packaged and stored?

A transparent explanation of the process can help customers make more informed purchasing decisions.

Cold-pressed describes an extraction method; it does not automatically guarantee purity, safety or superior nutritional value.

Frequently Asked Questions

How is cold-pressed groundnut oil made?

It is produced primarily through mechanical pressing of prepared groundnuts. The extracted oil may then undergo settling, relevant quality checks and packaging.

Does RJS clean groundnuts before pressing?

RJS's described raw material workflow includes inspection and checks for visible impurities such as stones and soil, followed by appropriate preparation before production.

What temperature is used to produce RJS cold-pressed groundnut oil?

RJS has described an approach that aims to keep groundnut and sesame oil processing below 50°C. Actual temperatures depend on process conditions and should be monitored during production.

Why is groundnut oil allowed to settle?

Settling allows some suspended particles to move toward the bottom over time, which can help clarify the oil. It does not replace appropriate quality and safety checks.

How long does RJS settle its groundnut oil?

RJS's described handling process includes approximately 7–14 days of settling in sunlight. The actual duration may vary depending on the product and process conditions.

Is cold-pressed groundnut oil always better than refined groundnut oil?

Not automatically. The oils are produced differently, and their nutritional characteristics depend on the specific product and processing. Consider overall product quality, intended use and dietary needs.

What is groundnut oil cake?

It is the solid by-product left after oil is extracted from groundnuts. Its possible uses depend on its composition and suitability for the intended application.

How should groundnut oil be stored?

Keep the bottle tightly closed in a clean, dry place away from direct sunlight and excessive heat. Follow the product label's storage instructions.

Explore RJS Healthy Foods

At RJS Healthy Foods, we believe customers should understand the journey behind their cooking oil—from raw material selection to mechanical extraction and finished-product handling.

Our approach brings together traditional oil production and attention to raw material preparation, processing and quality checks.

If you're looking for groundnut oil and other cooking oils for your kitchen, explore our product range.

RJS — Trusted Healthy Food Brand

The Beginning of Health.

Visit our official website:

Explore RJS Healthy Foods – https://rjshealthyfood.in/

Final Takeaway

Producing cold-pressed groundnut oil involves several important stages before the finished bottle reaches your kitchen.

Raw material selection, sampling, moisture assessment, cleaning, mechanical pressing, settling, quality checks and packaging all contribute to the overall process.

Understanding these stages helps customers look beyond the bottle and learn more about how their cooking oil is made.

From carefully assessed groundnuts to finished oil, every stage matters.