If you can’t find the answer you are looking for, please contact our technical department who will be happy to help:

Telephone: 0191 416 4995

Email: jbmstoresltd@gmail.com

Delivery charges to the UK mainland are:
– £8

All web orders place before 12pm Monday – Thursday will be delivered next working day. Unless there is an issue with stock levels or a courier issue.

We use plain packaging or security wrap. For dry ice orders ice will be contained in insulated packaging as well.

420PMUK recommends ordering the quantity of dry ice requires for your immediate or short-term use. As a guide, Dry Ice typically sublimates at a rate of 5% to 15% product weight per day depending on the thermal properties of the storage container and the external temperature profile. Product shelf life is variable and significantly affected by other factors such as the quantity of residue product in the insulated storage container and number of times the container lid is opened.

Your order will be packed into insulated packaging with a protective cardboard outer.

Dry ice has a short shelf life. The more ice you order the longer it lasts. Typically it can lose around 2kg per day. The 2.5kg will usually last for 24hrs if unused and left un-opened. It depends! 10kg can be consumed within minutes if added to sufficient hot water to create large scale effects. However, for smaller more subtle effects the dry ice can last for hours. We ship dry ice in thick polystyrene boxes and the ice will last for 3-4 days depending on how you store the ice. We recommend keeping the ice unopened in the packaging until it is required and to store the box in a safe cold place. Once ice has been used put the lid on the remaining product and place in a cold location.

Let us know asap! We can’t do anything if you’ve not opened it until weeks later (!!) to then say its faulty. Call us first to discuss

Liquid–liquid extraction also known as solvent extraction and partitioning, is a method to separate compounds based on their relative solubility’s in two different immiscible liquids, usually water and an organic solvent. It is an extraction of a substance from one liquid into another liquid phase.

Safety. Containing your solvent within your extraction method is safer and allows recycling.

Our extractors can be used with N-Butane, Iso-Butane, N-Propane or any mixture of the three solvents. Please contact us for compatibility with any other solvents.

The yield depends on a range of variables including, but not limited to, the method of the extraction, the temperature of the solvent, the temperature of the material, and the quality of the material. Our extractors are able to provide the maximum yield from the material packed into the column. Alternatively, you can use the extractor to maximize quality of the product over the quantity. Therefore, the yield depends on the operator and the goal of the extraction.

The stainless steel component of the extractors should be cleaned after every extraction with 91% or higher isopropyl alcohol. Be sure to take special care when cleaning Viton rubber gaskets as prolonged exposure to alcohol will degrade the gasket.

Anytime dangerous, explosive gases (Example: N-Butane, Iso-Butane, N-Propane) are used the work space should be an open, unobstructed, well ventilated area with ABSOLUTELY NO IGNITION SOURCES. We recommend operating our extractors with a hazardous exhaust system to ensure adequate ventilation is always maintained. As ignition of these gases can result in severe injury or death, extreme care should be used at all times.

The double bolt clamps should be evenly clamped down from both sides, switching from one to the other consistently. A washer should be in between the bolt and the clamp. Tighten the bolts down with a tool until you hear them squeak. The clamps should not need to be touching to be tight. 27Nm

Klarna’s Pay in 3 instalments and Pay in 30 days credit agreements are not regulated by the FCA.

Use of these and any missed payments may affect your ability to obtain credit from Klarna and other lenders. 18+, UK residents only.

Subject to status. T&Cs apply.


Yes, all of our vacuum chambers have been tested to their limits to ensure they are fit for purpose.

Yes, our vacuum chambers are rated to loose no more than 2.5HG in a 24 hour period.

Yes, the chambers can be safely heated to 71*C/160*F in excess of this the user assumes all risk.

We have paired our chambers with a suitable pumps in the chamber kit section, however most vacuum pumps are compatible.