Electro-deposited Gold (Au) Plating
Optiforms Electro-deposited Gold (Au) platings are proven to out-perform industry standard platings.
Optiforms Electro-deposited Gold (Au) Platings
Totally inert, gold is an excellent reflective surface for the near to far infrared spectrum. Gold is available as an electrodeposited plating or vacuum deposited coating based on the application and/or substrate material. Reflective scans are available upon request and are typically based off of flat witness samples coated in the same lot as the actual substrate.
Electrodeposited Gold (Au):
Pure Gold
- Deposit purity: 99.99% minimum
- Hardness: 130 Knoop
- Meets ASTM B488-01 Type 3 Grade C (supersedes MIL-G-45204).
Cobalt-Hardened Gold
- Deposit purity: 99.7% minimum
- Hardness: 130-200 Knoop
- Meets ASTM B488-01 Type I Grade C (supersedes MIL-G-45204).
ASTM-B-488 (MIL-G-45205)
Gold Purity
| Mass Percent Gold, Minimum, Excluding Potassium, Carbon, & Nitrogen | New ASTM Type | MIL-DTL-45204 | Old ASTM Type |
|---|---|---|---|
| 99.70 | I | I | 2 |
| 99.00 | II | II | 3 |
| 99.90 | III | III | 1 |
Gold Hardness
| Knoop Hardness Range | ASTM Code | MIL-DTL-45204 Grade |
|---|---|---|
| 90 HK25 maximum | A | A |
| 91 - 129 HK25 | B | B |
| 90 - 200 HK25 | ... | ... |
| 130 - 200 HK25 | C | C |
| >200 HK25 | D | D |
Gold Thickness
| Class | Minimum Thickness, µm |
|---|---|
| 0.25 | 0.25 |
| 0.50 | 0.50 |
| 0.75 | 0.75 |
| 1.0 | 1.0 |
| 1.25 | 1.25 |
| 2.5 | 2.5 |
| 5.0 | 5.0 |
Vacuum Deposited Gold
Enhanced Gold with Dichroic Stack
Applications
- Laser cavities
- Medical instrumentation