Dipslides are the most common way of checking for bacteria that may be present in metalworking fluids. If left untreated, bacterial contamination can lead to the buildup of harmful bacteria and fungal contamination, which can pose a serious health risk to operators. Dipslide testing should be conducted alongside other checks, including fluid dilution and pH levels, to ensure operator  safety, and optimal coolant performance. The Health and Safety Executive has lots of helpful information on how displides are used in industry.

Our Coolant Test Kit has everything you need to check the pH levels and more of your metalworking fluids.

Our Combi Dipslides should be kept in a cool, dry place (ideally between 8-15 °C) and away from direct sunlight. Dipslides are designed for single use, so you should dispose of them safely after use.

The incubation time for dipslides varies depending on what you’re checking for. Leaving them for 48 hours at 30°C is long enough to allow for bacteria growth. If checking for yeast and mould, allow an extra 24 hours. It’s vital to keep consistent incubation times. That way, you can compare your results accurately.

Our dipslides have a shelf life of between 6-12 months; the expiry date is detailed on the front of the box. Using expired dipslides is generally not recommended, as their reliability may be questionable. Over time, they tend to dry out and degrade, losing their sterility in the process. That means you’re more likely to get inaccurate or unclear results.

Here at Pennine Lubricants, we’ve had over 30 years of experience manufacturing lubricants and oils  for use in the metalworking industry. Based in Sheffield, we work hard to produce only the highest-quality products. We offer comprehensive technical advice and support to all our customers. If you have any questions, we’d be happy to help. Contact us today. Or, head over to our main page for measuring equipment to see how else we’re able to help.