Granite bases are coated with a layer of oil before shipment primarily for the following core reasons, all aimed at protecting the product during transportation and storage:
- Anti-rust & Anti-corrosion Protection: Granite contains trace metal minerals (e.g., feldspar, pyrite). During long-distance transportation, it may come into contact with moisture (air humidity, rainwater during loading/unloading) or acidic/alkaline substances, leading to surface oxidation, rust spots, or discoloration. The oil forms a dense protective film to isolate the granite surface from air and moisture, preventing corrosion.
- Prevent Surface Scratches: The oil acts as a lubricant. During packaging and transportation, the granite base may rub against packaging materials (such as foam, cartons) or collide slightly with other items. The oil film reduces friction, avoiding minor scratches, abrasions, or blemishes on the smooth surface of the granite.
- Maintain Surface Luster: Granite bases (especially precision-grade ones) require a smooth and intact surface. The oil can keep the surface moist, prevent dryness and slight cracking caused by long-term exposure to dry air during transportation, and retain the natural luster of the granite.
- Facilitate Subsequent Use: The protective oil is easy to clean (can be wiped off with a clean cloth and neutral detergent). It does not leave residues or damage the granite surface, ensuring that the base can be directly used for installation and debugging after unpacking.
Note: This protective oil is only for temporary protection during transportation and needs to be thoroughly cleaned before the granite base is officially installed and used, to avoid affecting the flatness and the fit with the bracket.
