| 摘要 |
THE PRESENT INVENTION RELATES TO A METHOD OF MARKING PAPER (50) FOR WRAPPING THE TOBACCO OF A CIGARETTE IN ORDER TO ENABLE THE AUTHENTICITY OF THE PAPER TO BE VERIFIED, IN WHICH THE PAPER IS MARKED WITH AN INVISIBLE AUTHENTICATING PATTERN (22) WHICH IS SUITABLE FOR BEING REVEALED ONLY BY EXPOSING THE PAPER (50) TO AN APPROPRIATE TEMPERATURE.(FIG 1)
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