photosensitive Anti-etching coating

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　　Craft Introduction：Metal etching is a surface treatment process, covering the metal substrate which part need to protect in printing or spraying then etching away the part we don't need with chemical corrosion.in order to improve the precision of etching,adapt to the demand of mass production,in order to solve this problem, our R&C department launched the sensitive anti-etching ink, and solving it by the photographic imaging and etching resistance performance of the ink. The ink is widely used in the etching process of metal products. 　　Characteristics: Applying to spraying and screen printing, coating layer uniform and no bubbles, drying fast, high resolution, good adhesion, strong anti-acid performance, etc. 　　Technological Process: Clean the surface of the substrate－spray(screen printing)－prebaking－exposure－developing-second baking(for deep etching)－etching－removing the ink. 　　 　　 　　Technical Features： Project Standard Viscosity 120-150 Pas（25℃） Fineness ≤15um Exposure energy 6-8case (Exposure guide rule 21case ) Hardness （Mitsubishi pencil，700g）≥1H Adhesion （3M high adhesive tape）100/100 Removing the ink 10%NaOH solvent 80-90℃，5-8mins 　Operation Conditions: 1.Pretreatment：wash and remove the oil and wax on the surface of Product. 2.Dilution：Mix the ink and diluent together at suitable ratio,setting for 5-10mins, our specific diluent will be added to the ink to adjust the viscosity ( at 1:0.7 ratio, or operating according to the specific circumstances ) , the use of other thinners to be done before the production matching experiments; 3. Spraying：The thickness of dried ink film should be 20-30um. Screen printing: Using 77T - 100T mesh size; 4.Prebaking：Hot air circulation drying at 80℃-90℃ for 10-15mins; 5.Exposure：6-8 case,（21 case Exposure guide rule）; 6.Developing：Washing with 0.8%-1.2% Na2CO3 solvent，about 2Kg / cm ² of the pressure , temperature at 30 ± 2℃; 7.Second baking： 150℃/30mins (if have deep etching process) ; 8.Etching; 9.Removing the ink：Remove the ink with 10% NaOH solvent at 90℃, then clean it with ultrasonic wave for about 1-3 minutes ; 　　Note: 1.Storage period：Sealed ink can be stored for six months in dry ventilate darkroom below 25 ℃, prolonged operation or storage in highlight or daylight is prohibited. 2.This ink can be used alone,if need to adjust the viscosity for this product, please use the dedicated thinner of the product,stir for 3-5 minutes before using , then stand the diluted ink for 10 minutes . 3.Keep the surface of product clean, it has a critical impact on the ink adhesion to the substrate, therefore the substrate need to be cleaned and the oxide layer required to have a thorough pre-treatment. Caution: 1.If accidental contact with skin or eyes , wash immediately with soap and plenty of water , or medical treatment in a timely manner. 2.This product is flammable, prohibited fireworks at storage and operating places.

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Vitayon Chemical Industry Co.,Ltd.(Shenzhen)

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