Abstract: The present invention basically consists of printing proofing marks on a film, placing it in contact with a food product, followed by an intense drying at low relative moisture and a smoking step which also occurs at low relative moisture for obtaining areas having a more smoked color in the food product under the proofing marks than in the areas not protected by said proofing marks.

Abstract: The present invention basically consists of printing proofing marks on a film, placing it in contact with a food product, followed by an intense drying at low relative moisture and a smoking step which also occurs at low relative moisture for obtaining areas having a more smoked color in the food product under the proofing marks than in the areas not protected by said proofing marks.

Abstract: Such has discontinuous areas soaked in a proofing substance, preferably polyvinylidene chloride (PVDC) which is impermeable to both gases and liquids, and thereby on establishing areas representing a logotype, a text, an anagram or any other design with said proofing substance, when the cellulose casing is later filled with the meat emulsion, and the same is smoked or colored through the cellulose casing, the proofing substance will provide a barrier to such later soaking thereby for the smoke or coloring to cross only those areas of the cellulose casing which have not been treated with the proofing substance, that are then colored, providing a background upon which "printed devices" appear that are formally, dimensionally and positionally coincident with those existing on the cellulose casing, when the casing is finally removed, such "printed devices" being duly established upon the sausage proper.