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Silver Conductive Paint: Silver Powder in Methacrylate Resin and Acetone, Dried at 25-75 °C (NBS Circular 468, 1947)
A silver paint that conducts once it dries at room heat, with no firing, so it can go on plastics and be used to fix leads and draw conductors. Fine silver powder is held in methacrylate resin dissolved in acetone.
Source: Brunetti and Curtis, Printed Circuit Techniques, NBS Circular 468 (1947), Table 2, the column for thermoplastic plastics: 70 % silver powder, 20 % methacrylate or polystyrene resin, 10 % ketones, benzene, toluene or ethylene dichloride, dried at 25 to 75 °C. This is the methacrylate (acrylic) version. Ours: precipitated silver ground fine as the silver powder, and acetone of the four solvents. Picture drawn by Youblob.
Baguhan
1 day
Mga Tagubilin
1
1
Dissolve 20 g methacrylate resin in 10 g acetone
Dissolve 20 g methacrylate resin in 10 g acetone
For 100 g of paint: put 20 g methacrylate resin and 10 g acetone in a jar, close it and let the resin dissolve, stirring now and then. Ours: acetone, one of the four solvents NBS names. Fumes: work in the open air, gloves and goggles.
Mga materyales para sa hakbang na ito:
Butil na akrilik20 g
Acetone10 gMga kailangang kasangkapan:
Timbangang panimbang
Garapong Salamin
Baras na Salaming Borosilicate
Gwantes na Nitrile
Salamin Laban sa Tilamsik ng Kemikal2
2
Grind 70 g silver powder fine and stir it in
Grind 70 g silver powder fine and stir it in
Grind 70 g silver powder fine and stir it into the resin solution until even. NBS asks for at least 50 % silver for a brushed paint; this one has 70 %. Ours: precipitated silver as the powder.
Mga materyales para sa hakbang na ito:
Pinaulang pilak70 gMga kailangang kasangkapan:
Timbangang panimbang
Almires at PanghaloBaras na Salaming Borosilicate3
3
Stir well, keep the jar closed
Stir well, keep the jar closed
Stir the paint thoroughly before each use, and keep the jar closed so the solvent does not evaporate and thicken it.
Mga kailangang kasangkapan:
Garapong SalaminBaras na Salaming Borosilicate4
4
Brush on and dry at 25 to 75 °C
Brush on and dry at 25 to 75 °C
Brush the paint on and dry it at 25 to 75 °C to drive out the solvent. It then conducts. Brushing is ours; NBS also names spraying and screen stencils.
Mga kailangang kasangkapan:
Mga pinong pinsel
Hurnong pantuyo
Termometro ng HurnoMga Materyales
3- 20 gPlaceholder
- 10 gPlaceholder
- 70 gPlaceholder
Mga Kinakailangang Kasangkapan
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