How to judge the quality of Chocolate Boxes For Gifts varnish?

How to judge the quality of Chocolate Boxes For Gifts varnish?

In theory, the chemical composition of the Chocolate Boxes For Gifts varnish should be determined. From the application point of view, it is a simple method to check the quality of the Chocolate Boxes For Gifts varnish purchased by the user.

①Smell the smell. The solid content of UV oil is more than 95 percent , and the volatility of solid content substances is very small. Therefore, a good Chocolate Boxes For Gifts varnish has a very small smell and should be less smelly than the ink used for printing. The less odor the better after curing.

②Measure the solvent content. Put the glazing oil into a graduated vessel (less than 50mm in diameter), place the paper for 12 hours, and observe how much volatilization occurs. The drop in surface position is generally not seen. If the drop is obviously observed, it means that the solvent in the Chocolate Boxes For Gifts varnish is too much, which is a fake and inferior product of the original Chocolate Boxes For Gifts varnish with diluent added.

③UV glazing oil is a non-conjunctival material, like edible oil, it will not crust on the surface for a long time. Place a small amount of glazing oil on the surface of the glass sheet, and place it in a dark place for 24 hours to observe whether there is crusting. No crusting means UV oil, otherwise it is fake UV oil.

④Irritating to the skin. Put a small amount of Chocolate Boxes For Gifts varnish on the back of the hand and observe for about 20 minutes to see if the skin turns red or blistered. Good Chocolate Boxes For Gifts varnish basically fails to respond to the skin, while general Chocolate Boxes For Gifts varnish will appear erythema, and bad Chocolate Boxes For Gifts varnish will cause the skin to blister. .

⑤ Observe the color of UV oil. Put the UV ink in a glassware with good transparency and observe, the lighter the color, the better the quality.

⑥ Viscosity. Different viscosities are selected according to different glazing models, such as ordinary three-roller and gripper glazing machines, the viscosity is 3040s.

⑦ Leveling. Check the printed matter after photocuring, there are ripples indicating poor leveling. The solution is to reduce the viscosity, heat or add a diluent; the second is to extend the coating and curing time to make it fully leveled and then cured.

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