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That is why I asked. If it is in fact "embossed" or as the asker actually asked "perferada" which literally means "holes" whweas the "selo branco" simply shifts the horizontal axis of the substrate resulting in the so-called "embossed stamp" which has no "holes" other than those which may result from the absence of a homogenous papar fibre matrix. http://en.wikipedia.org/wiki/Paper_embossing