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| No. | Item | Standard requirement | Paint technical specification | |
| 1 | Appearance | Uniform color, no obvious mechanical impurities, and flocculent | Uniform color, no obvious mechanical impurities, and flocculent | |
| 2 | Surface drying time | <45（min） | 15～17（min） | |
| 3 | Hydrophobicity | Hydrophobicity | Qav（°）≥100°, Qmin（°）≥90° | Qav（°）105～107, 95～97° |
| HC1～HC2 | HC1 | |||
| The weakening property of hydrophobicity | Qav（°）≥90°, Q min（°）≥85° | Qav（°）93～94, 87～88° | ||
| HC3～HC4 | HC1～HC2 | |||
| Recovery properties of hydrophobicity | Qav（°）≥95°, Q min（°）90° | Qav（°）103～104, 97～99° | ||
| HC2～HC3 | HC1 | |||
| The transfer properties of hydrophobicity | Qav（°）≥100°, Q min（°）90° | Qav（°）113～114, 103～106° | ||
| HC 2～HC 3 | HC1 | |||
| 4 | Volume resistivity | Pv（Ω.m）≥1×14power | 1.63×14power～1.8×14power | |
| 5 | Relative dielectric constant | εr≤3.0 | εr 2.78～2.81 | |
| 6 | Dielectric loss tangent value | tgδ（%）≤0.3 | tgδ（%）0.26～0.27 | |
| 7 | Dielectric strength | E（Kv/mm）≥18 | E（Kv/mm）22.2～22.8 | |
| 8 | Resistance to electrical erosion | Not lower than TMA4.5 | TMA4.5 | |
| 9 | Adhesion force | Circle method: Better than level 2 | level 1 | |
| 10 | Abrasion resistance | ≤0.05（g） | 0.031～0.033（g） | |
| 11 | Chemical resistant agent | In 25.3% acid, alkali, salt reagent for 24h, there should be no shedding, wrinkling, foaming, discolouration | No shedding, wrinkling, foaming, discoloration | |
| Oil resistance | In 100°C transformer oil for 24h, there should be no shedding, wrinkling, foaming, discoloration | No shedding, wrinkling, foaming, discoloration | ||
| 12 | Power frequency wet lightning voltage | The frequency wet lightning voltage of coated insulators shall not be reduced relative to that of uncoated insulators | U1=51.5～51.6KV | |
| U2=46.7KV | ||||
| 13 | Anti-fouling lightning voltage | U1/U2≥1.5 | U1/U2 2.01～2.03 | |
| 14 | Flammability | Superior to the FV-2 stage | FV-0 | |
| 15 | Solid content | Solid content（%）≥50 | Solid content（%）54.7～55.0 | |
| 16 | Shear strength | T（Mpa）≥3.0 | T（Mpa）3.06 | |
| 17 | Tear strength | ≥12KN/m | 17.92～20.12KN/m | |
| 18 | Aging resistance | After 1700h salt spray test of coating (1) each series of porcelain bottles does not exceed 3 wen without overcurrent interruption; (2) No trace of electric leakage, electric erosion does not reach the surface of porcelain; (3) hydrophobic migration is HC2 ~ HC3; (4) The bonding tensile shear strength is not less than 3.0Mpa | (1) No overcurrent interrupt; (2) No trace of electric leakage, electric erosion does not reach the surface of porcelain; (3) hydrophobicity was HC1; (4) The bonding tensile shear strength is 3.01Mpa, 3.00Mpa, 3.00Mpa, 2.98Mpa, 3.03Mpa, respectively | |
