100 charcoals to burn incense. 33 mm. These charcoal tablets are manufactured with a new formula which allows for a sure and fast lighting, without smells and without ash emission. To light a charcoal tablet, just keep it upright and expose it to a flame on one side. Once the ignition phase has started, you have got a few seconds to put the tablet down before it becomes completely incandescent. All charcoal tablets are to be kept dry; this is the reason why or tablets are packed in airtight aluminium bags.