معالجة سطح الزجاج

The main component of glass is SiO₂, Si is mainly in the glass inside the oxygen atom on the glass surface, this structure has a high surface energy, it is easy to interact with other substances such as air, will combine with hydrogen in the air, forming a hydrophilic gene, 0H(hydroxyl) this hydrophilic group floats on the glass surface, ink attachment is very difficult. There are alkali ions on the glass surface, forming the Na-0 bond. This key is easy to break the key in air and water, resulting in ink difficult to adhere. Therefore, the glass surface must be treated to print. There are several methods of glass surface treatment:

①Grease sensitive treatment, grease sensitive treatment is coated on the surface of the glass with various siloxane coupling agents to form grease sensitive groups to improve the affinity of the glass to the ink.

② Degreasing treatment, remove grease to improve wettability, clean degreasing with acetone, methyl ethyl ketone, or degreasing with dichloroethylene steam.

③ Strong acid treatment, through strong acid treatment, remove alkali ions to improve ink adhesion.

④ Physical treatment, mild sandblasting with fine powder abrasive or water grinding with water abrasive paper can remove surface attachments and improve ink affinity.