| 1. Fiber Preparation | Cellulose fiber | Bleached or unbleached wood-pulp fibers; some grades may include recycled fiber where food-contact regulations permit | Provides the basic structure, strength, foldability, and printability of the paper | Food-contact grades require controlled raw materials and must meet applicable migration and hygiene requirements |
| 2. Pulp Slushing | Water-based fiber suspension | Cellulose fibers are dispersed in water to form a dilute pulp slurry before sheet formation | Allows the fibers to distribute evenly and form a uniform paper web | Process water quality and cleanliness affect the consistency and safety of the finished paper |
| 3. Sheet Formation | Paper-machine forming section | Water is drained from the slurry on a moving forming fabric, leaving an interlocking wet fiber mat | Creates the continuous paper sheet | Fiber orientation and formation influence tensile strength, tear resistance, and handling performance |
| 4. Pressing and Drying | Mechanical pressing and heated-cylinder drying | Excess water is removed mechanically and then by controlled evaporation | Builds sheet strength and brings the paper to a stable moisture level | Excessive heat or uneven drying can cause curling, brittleness, or dimensional instability |
| 5. Paper Calendering | Roll pressing and surface finishing | Paper passes through polished rolls to adjust smoothness, thickness, density, and gloss | Improves wrapping performance, surface appearance, and coating uniformity | Higher density can improve grease resistance but may reduce bulk and absorbency |
| 6. Greaseproof Treatment | Highly refined cellulose structure | Dense, highly beaten fibers create small pores without requiring a separate plastic coating | Helps resist the penetration of oils and fats in bakery and snack applications | Grease resistance depends on fiber refining, sheet density, basis weight, and the specific food contact |
| 7. Parchment Treatment | Regenerated cellulose surface | Paper may be treated with sulfuric acid and then thoroughly washed and dried to create parchment-like properties | Produces a stronger, smoother, and more grease-resistant sheet suitable for baking and food wrapping | Acid treatment is an industrial process; residual chemicals must be controlled within applicable limits |
| 8. Wax Coating | Paraffin wax or other approved wax blends | Wax is applied as a thin layer by coating, curtain application, or heated impregnation | Improves moisture resistance, grease resistance, release properties, and foldability | Wax-coated paper is generally intended for suitable cold or moderate-temperature uses, not direct contact with every hot food |
| 9. Polymer Coating | Polyethylene or another approved polymer | A thin polymer film is extrusion-coated or laminated to one or both sides of the paper | Provides stronger barriers against water, grease, and liquid leakage | Use temperature, food type, coating thickness, and recycling infrastructure determine suitability |
| 10. Silicone Coating | Food-contact silicone release coating | A very thin silicone layer is cured on paper, commonly for baking and non-stick applications | Provides release performance and helps prevent dough, confectionery, or oily foods from sticking | Silicone-coated paper should be used according to the supplier’s stated temperature and food-contact limits |
| 11. Printing and Surface Treatment | Water-based or other approved printing inks | Graphics may be printed on the non-food-contact side; coatings or varnishes may be added for protection | Provides product information, handling instructions, and visual identification | Ink set-off and migration must be controlled, especially when printed surfaces can contact food indirectly |
| 12. Slitting and Converting | Roll cutting, sheet cutting, folding, or forming | Large master rolls are converted into rolls, sheets, bags, interleaving sheets, or formed wraps | Creates the required dimensions and packaging format | Clean equipment, controlled dust, and proper storage help prevent contamination during conversion |
| 13. Quality Testing | Physical and barrier testing | Common tests include basis weight, thickness, tensile strength, tear strength, Cobb water absorption, and grease resistance | Confirms that the wrapping paper performs consistently during filling, wrapping, storage, and transport | Results should be evaluated against the intended food, contact duration, temperature, and regulatory requirements |
| 14. Finished Product | Paper-based food wrapping material | May be uncoated, greaseproof, parchment-style, wax-coated, polymer-coated, or silicone-coated | Protects food from handling, surface contamination, grease, moisture, light, or limited oxygen exposure, depending on construction | No single wrapping paper provides every barrier; the correct structure depends on the food and intended storage conditions |