In modern society, people need to use a lot of glass products in their daily lives, and it is completely impossible to get rid of glass. Glass is stable, resistant to strong acids and alkalis, and is hard and durable. It is one of the raw materials required for most important equipment. Want to learn more about how glass is polished and how to polish it? Let’s find out together!
What are the methods of glass polishing
Method 1: Fire Polishing
The use of flame to soften the glass surface and the impact of firepower on the glass can solve some material grains on the surface of glass products, but the flatness of the glass surface after treatment will be reduced. Generally, the mouth of hollow vessel glass is rough after cutting, and this method can be used for polishing. .
Applicable material glass: soda lime glass, high bouncing silica glass.
Method 2: Polishing Powder Polishing
The high-speed friction of polishing powder on the glass surface is used to remove scratches, which can maximize the light transmittance and refraction effect of the glass. Before polishing, the polished part should be sanded with abrasive belt, and the pure plane should be polished with a 400-mesh emery abrasive disc. There are many tools and materials used for this polishing method, but the better effect is the wool wheel cerium oxide.
Applicable material glass: the vast majority of glass products.
Method 3: Acid Polishing
The surface of the glass is treated by the corrosive effect of acid on the glass. Before polishing, the surface of the glass should also be polished with abrasive belts, because acid polishing can reduce the thickness of the glass a lot, but it may not be able to remove all the lines of the glass.
Applicable material glass: any glass (but the effect after polishing is determined by the glass material itself).
glass polishing steps
1. Glass surface cleaning and preparation before glass polishing
(1) First surround the edge of the glass to be corrected with tape to avoid contaminating the surrounding environment when the glass is polished.
(2) Carefully clean the surface of the glass and glass polishing sandpaper, and there should be no dust, sand, etc. attached.
(3) Before the glass is polished, use a marker to circle the part to be polished and corrected on the back of the glass to avoid slipping and causing the polishing area to be too large.
2. Use P120#, P240#, P400#, P600# glass diamond sandpaper to clean glass scratches
(1) Note that the model of sandpaper here is different from that of daily hand-throwing sandpaper, and cannot be mixed with daily sandpaper.
(2) Pour out a little of the polishing stock solution as needed, dilute it with water at a ratio of 1:1, not more than 1:5, and it is specially used for sandpaper polishing.
(3) Make sure that the polishing liquid is sufficient at the scratch polishing place, and the sandpaper cannot be directly dry-grinded on the glass surface at any time.
①Deep scratches: first use P120# glass sandpaper for initial grinding, then use P240# to smooth it, and finally use P600# sandpaper to polish it again to make the surface meet the polishing requirements. You can also omit this item and go directly to the third step.
②Slight scratches: Use P400# diamond hand pads for glass, and then use P600# sandpaper to polish it again to make the surface meet the polishing requirements. You can also omit this item and go directly to the third step.
3. Replace and add the polishing stock solution and use a special polishing wheel to polish and restore the transparency of the glass
(1) Wipe the glass clean and observe the grinding range of sandpaper, apply the polishing solution and use a special polishing wheel (with appropriate pressure, the polishing machine tray and the glass surface should be flat). If there is no polishing machine, it can be polished with a manual polishing sheet. Be careful not to move too fast at this time, and polish it finely to ensure the effect.
(2) If the gloss is not good, repeat the above steps
Matters needing attention: Although high-level scratches with a depth of more than 100 microns can be removed by polishing, they will affect the safety performance of the glass after polishing. In particular, scratches with a depth of more than 100 microns on the front windshield of automobiles are not suitable for polishing.
A brief summary is: first wet sand with diamond sanding block to gradually remove marks, and then use polishing pads and polishing liquid to polish and translucent.
Post time: Jul-14-2022