Around here we have the more hazardous kind of the strike anywhere matches. The entire head is made from ignition material. Even with those match-to-match contact is no issue. The space in the container simply doesnīt allow the matches to achieve a sufficient speed for ignition. My main reason for packing cotton wool in the container was the abrassion on the head caused by the rattling.
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If it isnīt broken, it doesnīt have enough features yet.