For two reasons current emulsion-based sunscreens do not provide adequate UV protection. The film they produce, when spread normally on the skin, is too thin; they also have only a limited ability to maintain a protective film on the skin during normal activity.
Because of this widespread deficiency sunscreens commonly carry the instructions to reapply these water-based sunscreens every two hours. More than this, sunscreen users are faced annually with the slip slop and slap campaign, undisguised advice to apply the product in liberal quantities which are frequently messy.
Users are also advised to wait 30 minutes after application before venturing out into the sun.
“The only sunscreen hassle in our house these days is when we can’t find the Active pottle. The kids hate to have to use other kind now. When they were little, they were won over by the ‘only once all day’ promise. Now they like how it goes on, and how it never seems to wear off. So do we: brilliantly liberating. And that comes from a blue-eyed freckly white skin woman. No burns, ever. Not even all-day beach sessions.” Naomi O'Connor ....read more
‘Endorsement of ‘Active’ in a leading outdoor publication
In the Bulletin of the Federated Mountain Clubs, Number 191, March 2013. Robin McNeill (Jacko), in his regular column, wrote the following:
I don’t normally get unabashed marketing calls, but Brian Wilkins asked me to try his sunscreen, ‘Active Sunscreen’ which has been advertised recently in the FMC Bulletin. Brian developed it after teaching pharmaceutical chemistry students. Brian probably won’t get rich selling this product as you only need to apply it sparingly. One application worked for an entire hot sweaty day, so one pottle will last a long time. Brian tells me that, if your skin feels greasy, you have put too much on. It is non-aqueous. He also tells me that it works well as a lip salve, and for skin waterproofing, ie. to help ward off soggy feet, and has even been used effectively for cuts and abrasions. The downside is that you can’t see exactly where you have applied it, meaning missed spots won’t be revealed until later that evening. I normally hate the sensation of sunscreen and I found ‘Active Sunscreen’ a big improvement on anything else I’ve tried.
Letter published in the New Zealand Listener, November 13-19th 2010, p.8.
People writing about sunscreens (Health, Oct.30), could pay some attention to teasing out what the sun protection factor really implies. A little simple arithmetic can clear away decades of misinformation. SPF has no dimensions; it is the ratio of two other numbers.
When we see where these have come from, we are on the way to a better understanding. The standard SPF test involves using a UV lamp to produce a mild burn on a volunteer’s skin. (Even a mild burn has been shown to produce precancerous damage). For example, if it took two minutes to burn skin that had been coated with a measured amount of sunscreen, and four seconds to produce the same burn on coated skin, the SPF would be 120/4 ie. 30.
Human skin, depending on the skin type and the time of day, takes about fifteen minutes in the sun to become red. We are often told that we can multiply the SPF by this time to calculate how long we can safely stay out in the sun, eg. 30 x 15 minutes, or seven-and-a-half hours. But, as Joanne Black told us (The Black page, January 10, 2009), if using the SPF 30+ product she named, we should reapply it, not every seven-and-a-half hours but every two hours.
What has gone wrong? Why the discrepancy?
The UV lamp, being so much more powerful than the sun, required only two minutes; not much of a rehearsal for hours out on the sports field. That is the explanation; as far as sunscreens are concerned, real life and the laboratory are very different places. In other words the SPF test doesn’t tells us how much protection we will still be getting during actual use, moving and sweating.
Some products stay on the skin better than others.
Dr Brian Wilkins
When applying Active High Performance sunscreen you only need to use a small amount and rub it in until it disapears onto your skin and then move to the next area in need of protection.
You do not need to use the Slip Slop Slap approach. You do not need to apply too liberally and you will know if you have used too much as you will still see it on your skin after 2 minutes.
Because it is water free you only need apply it once per day as it does not sweat off.
After swimming and drying yourself we would recommend reapplying.
Our Active Sunscreen has a SPF of 30 and it is broad spectrum protecting against UVA and UVB rays. It has a 4 hour water resistance rating.