SunChemical Gwent C70709D21 Silver Ink

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SunChemical Gwent C70709D21 Silver Ink (discontinued **)
Categories:	Fluid; Other Engineering Material; Ceramic/Metallic Coating
Material Notes:	Silver Ink C70709D21 is designed as a top coat for Silver Zinc Ink C70709D22 when printed on PTC ceramics. The C70709D22 should be dried and coated with the C70709D21 before the final drying and firing. The ink is in a ready to use form at a viscosity suitable for automatic or semiautomatic screen printing. The ink should be gently stirred before use avoiding introduction of air bubbles. Information provided by Gwent Electronic Materials Ltd.
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Physical Properties	Original Value	Comments

Particle Size	3.0 µm	Main Break; Fineness of Grind
	5.0 µm	3rd Streak; Fineness of Grind
Viscosity	15600 cP @Shear Rate 230 1/s, Temperature 25.0 °C	Haake VT550 cone and plate viscometer (PK1.1°)
Storage Temperature	20.0 °C

Electrical Properties	Original Value	Comments
Surface Resistivity per Square	0.0055 ohm	fired; 20.7 microns thick

Processing Properties	Original Value	Comments
Processing Temperature	120 - 150 °C
Cure Time	0.167 - 0.25 hour
Shelf Life	3.00 Month

Descriptive Properties
Coverage cm²/g	150	230 mesh stainless steel screen
Printing Mesh counts/inch	180 to 340	stainless steel or polyester screens

**
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WGEM100 / 75953

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