Our Benchmark

Butane gas lighter refills and the 'Near Zero Impurities' benchmark.

There are two quite different uses for butane gas lighter refills.

Group A
To produce a conventional flame - (Examples are flint, piezo crystal or battery cigarette lighters, domestic cooker lighters. Butane candles, full size blow torches).

The level of impurity content is not important for butane gas refills used for the purpose of producing a conventional flame.

Group B
To generate heat for butane powered thermal products, not requiring a conventional flame. (Examples are windproof, turbo and flameless cigarette, pipe or cigar lighters, miniature blow torches, miniature soldering irons, hand warmers, hot food containers, performing dolls, toy trains, hair stylers and curlers, portable smoothing irons, mobile thermal jackets, hot cushions, medical warmer belts).

For all such thermal products the butane lighter refill must not have an impurity content above 50 parts per million (i.e. one part in 20,000 parts) because a higher impurity content MAY DAMAGE THE EQUIPMENT BEYOND REPAIR.

Unlike Keen (World Marketing) Limited other makers of branded butane lighter gas refills DO NOT publish the stable impurity levels of their products which may be because their unstable impurity levels increase to several hundred parts per million.

The Near Zero Impurities logo has become the quality assurance standard in butane gas manufacture

These famous brands of lighter gas are all manufactured to the Newport system and are permitted to use the zero impurity benchmark.

Colibri Colton Cora CTC Davidoff David Ross Dunhill

IMCO K2 Newport Sarome Silver Match Unilight Win

All benchmark butane refills supplied only by Keen are safe to use with flameless, turbo and windproof lighters and all butane powered thermal products.