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If you need to turn off your processes for a prolonged period, the following points should be considered:

Already opened jars/cartridges

In general, once a new jar of solder paste has been opened the manufacture tends to provides a maximum of 1 month’s shelf-life before recommending the paste is disposed of as waste (please check with you manufacturer for exact shelf life).

If you are removing used paste from a stencil it should never be returned to the original jar and if you are not using it again until after your close-down period, disposal of this paste would be recommended.

Unopened jars/cartridges

Most manufacturers recommend storing new, unopened jars in a fridge or cooling cabinet (between 0 to 10 °C). You need to follow your manufacturers storage instructions to ensure you obtain the full shelf-life of the product. The shelf-life will often be different for smaller containers such as syringes.

There will be a date code or shelf-life expiry date on your container for your reference.

Please note that cartridges can be stored vertically or horizontally. If you store yours horizontally (on their sides) they should ideally be rotated regularly during storage. You will need to take this into consideration when you return to production as flux may have separated if left in one position for too long, which will mean you will need to perform extra kneading strokes on the stencil before printing.

Expired shelf-life on your return

If when you return to production, you find solder paste which has passed its expiry date you will most likely find it will work perfectly well and cause no issues (please check with your manufacturer before doing so). This is however subject to the containers being stored correctly, as per the manufacturer’s instructions.

For our Koki customers we can offer a service to re-validate the paste and ensure that it is still within the manufacturer’s specifications and therefore safe to use.

Should you have any questions please do not hesitate to contact us, we are here to help during these unprecedented times.

Thank You

Fraser Technologies are proud to have supported the cleaning industry for last 50 years, working closely with their customers to understand their challenges and their expertise to offer best-in-class cleaning solutions. From component cleaning, electronics soldering, and heat transfer & carrier fluids they have built their expertise over the last 50 years and still continue to offer technological advances, adapt to legislative changes and embrace environmental challenges.

Fraser Technologies are well known for being considered one of the leaders within the Precision Cleaning industry and offer a wide range of new generation chemistries coupled with both solvent and aqueous cleaning systems. They can help extend the life of existing processes and equipment, recommend and install new equipment, or look at how best to improve efficiency and reduce environmental impact. This is all achieved through their superior trial and demonstration facilities and first class after sales service.

Companies from the aerospace & defence, electronics, medical, optics and automotive industries have chosen to work with them because of their expert knowledge in their industries, their independent range of products, and their can-do tried and tested approach to ensuring they provide access to the latest technologies – improving performance, productivity, environmental performance and operator safety.

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