THIS is why you need to wash your hands “for at least 20 seconds”

Person washing hands with a Hygienius mobile handwash unit

Effective vigorous techniques take time, says report

There has been a great deal of publicity regarding the necessity of effective hand washing techniques, particularly since the onset of the current pandemic, but the “physics underlying the hygienic habit has not been well-studied” – until now, according to a recent report on the Daily Mail website.

A study by South Cambridgeshire applied mathematician Paul Hammond has revealed that “vigorous scrubbing” provides tangible results, writes Ian Randall.

A two dimensional model, considering hands on a microscopic scale, depicts a “pair of wavy surfaces” which are separated by the film of soap and water liquid. The surface of the skin had comparatively deep valleys which can act as “potential wells”, trapping viruses and bacteria which the washing process is intended to remove.

Dr Hammond is quoted as saying

“If you move your hands too gently, too slowly, relative to one another, the forces created by the flowing fluid are not big enough to overcome the force holding the particle down.”

The conclusion drawn is that a faster, more vigorous motion will achieve a greater level of cleanliness – a process likened in the article to “scrubbing out a stain on a shirt.”

Hand washing techniques

The NHS website provides comprehensive video, photographic and written instruction in an article How to wash your hands.

Why you should ALWAYS wash your hands for at least 20 seconds: Mathematical model reveals how viruses and bacteria can remain lodged in crevices even with vigorous scrubbing »

Provide effective hand washing for everyone – wherever it’s needed!

Teal produces a comprehensive range of mobile sinks and portable basins for every type of hand washing situation for use by anyone who needs to wash their hands effectively, whether they’re in an office environment, temporary accommodation or out in the field on a daily basis.

The images (above) show the Hygienius mobile handwash unit.

There are vehicle mounted, wall mounted, mains powered and free standing hand wash stations as well as mobile sinks for use with pre-heated hot water.

The Teal range of mobile sinks includes the MediWashHygienius and Hygienius ProWashBigSynkSuper StalletteTEALwashHandeman XtraCompact ClassicHandSpa and the new CliniWash.

Coming soon – Teal’s most mobile handwash unit ever!

WashStand Xtra mobile sink for indoor and outdoor caterers

Introducing the new WashStand Xtra – highly mobile foot pump operated hand washing – wherever it’s needed!

A rugged go-anywhere unit, easy to clean and use, the WashStand Xtra needs no water or electrical supply. It can be used anywhere a hand wash is required – indoors or out!