Cold Pressing Procedure

Selection and Cleaning of Mustard Seeds

Choose high-quality mustard seeds, either yellow or black. The quality of the seeds will directly affect the quality of the oil.
Clean the mustard seeds to remove any dirt, debris, or foreign particles. You can wash the seeds in clean water and let them dry completely before processing.

Cold Pressing Process

Setup the Cold Press Machine

Load the clean mustard seeds into the cold press or oil expeller machine. The cold press works by slowly crushing the seeds under hydraulic pressure at room temperature, so its important to ensure the machine is well-calibrated to extract oil gently.

Start Pressing

As the machine applies pressure to the seeds, oil begins to seep out. This oil is collected in a clean container.
The residual cake (pressed seeds) can be collected separately, and some people use it for animal feed, compost, or other purposes.

Collection of Oil

The first oil that comes out of the press is the "crude mustard oil" and might contain small particles and impurities.
You can filter the oil through a muslin cloth or cheesecloth to remove any solid particles.

Settling and Filtration

Allow the oil to settle for 48 hours or overnight. During this period, any fine particles will sink to the bottom.

Storage

Store the cold-pressed mustard oil in steel container Keep the oil in a cool, dark place to preserve its flavor and nutritional properties.