The composition of gold and silver ink and its application in the manufacture of Printed ESD Shielding Membrane Switch

The composition of gold and silver ink and how is it applied in the manufacture of film buttons? Like other inks, gold and silver inks are mainly composed of two parts: pigments and binders. Simply put, golden ink is blended with gold powder and gold blending oil, and silver ink is blended with aluminum powder and silver blending oil.

1. Pigment

The pigment in golden ink is gold powder, which is actually a powder made of copper and zinc alloy. The content of zinc in gold powder is generally about 8% to 30%, among which the zinc content is between 8% and 12%. The color of gold ink is reddish, and it is customarily called red gold. The color of gold ink with zinc content between 20% and 30% is more blue. It is generally called cyan, which is between red gold and cyan gold. It is green, red and gold. In Itema Membrane Switch printing, 800 mesh gold powder is generally used for the deployment of gold ink, and the surface of the gold powder particles are mostly covered with surfactants, which can be well combined with the resin binder. Silver powder is actually aluminum powder, which is composed of 65% flake aluminum powder and 35% volatile hydrocarbon solvents. Adhseive To LSE Plastics Membrane Switch. Aluminum powder pigment has a small specific gravity and is easy to float in liquid. What is used in printing silver ink is the floating silver powder that has the ability to float in the binder. Silver ink generally uses 400-1000 mesh silver powder. If silver ink is printed on a large area, a lower mesh silver powder can be used. For example, 400 mesh silver powder is used to prepare silver ink ink, which has a higher metallic luster after printing. Printed Circuit Board Membrane Switch.

2, the link material
The bonding material used in the gold and silver inks widely used in the printing of film key panels is a special ink-adjustable oil, generally called gold-adjusted oil or silver-adjusted oil, and the main components are oil, resin, and organic solvent. Supplementary materials. The binding material of printing ink should meet the following conditions:
(1) The transparency must be high, and it cannot affect the hue of gold and silver ink.

(2) It must have enough viscosity to combine well with gold or silver powder.

(3) Gold or silver oil should also have quick-drying and fast-fixing properties to prevent the back of the gold ink or Silver Ink Membrane Switch panel from sticking to the back.

(4) The acidity of gold or silver oil should be low, otherwise it will cause chemical reaction of gold powder or silver powder.
3. Additives
Printed ESD Shielding Membrane Switch. In winter, adding a small amount of red dry oil to the gold ink can speed up the drying speed; adding a small amount of bright paste or transparent yellow to the metal can enhance the ink affinity and transfer ability of the gold ink; adding a small amount of bright paste to the gold ink can improve the drying speed While diluting the gold ink, it improves the brightness and viscosity, reduces the accumulation of gold ink and improves the fluidity. Adding stearic acid amide surfactant when adjusting the ink can make the gold powder fully wet, disperse and float in the binder. Reduce the phenomenon of paste and pile-up in the process of ink transfer.
Gold ink and silver ink are widely used in the manufacture of membrane keys. They can effectively improve the product grade of membrane keys, enhance aesthetics, and improve artistic and decorative effects. Especially in consumer electronics and household appliances, gold ink and silver ink play an irreplaceable role.