* carry the CE mark approved for direct solar viewing
* are not scratched or marked
* do not have holes in them; providing you hold the filter firmly over your eyes before looking up at the Sun and look completely away before you take it away. The Sun should appear quite dim and the sky completely black - if this is not the case then do not use the filter and do not look at the Sun.
* You must not view the eclipse by looking at the partial phase of the eclipse directly, through sunglasses or photographic negatives, through other filters of any sort, or through binoculars, a telescope or camera.
* If you are in the zone of totality on August 11, 1999 - the Isles of Scilly, Alderney, much of Cornwall or south Devon -you may view the totally eclipsed Sun directly without a filter, but you must look away the moment the first light of the Sun reappears, and use the correct filter again.
Supervising adults are at all times responsible for any children in their charge. You view the solar eclipse at your own risk. The Times Educational Supplement and Ordnance Survey cannot be held responsible for injuries resulting from viewing the eclipse.