Test mixture. 1.2.1.1.1. For headlamp with the outside lens in glass: The mixture of water and a polluting agent to be applied to the headlamp shall be composed of: 9 parts by weight of silica sand with a particle size of 0-100 µm, 1 part by weight of vegetal carbon dust (beechwood) with a particle size of 0-100 µm,
Test mixture. The test mixture shall be composed of: Silica sand of hardness 7 on the Xxxx scale, with a grain size between 0 and 0.2 mm and an almost normal distribution, with an angular factor of 1.8 to 2; Water of hardness not exceeding 205 g/m3 for a mixture comprising 25 g of sand per litre of water.
Test mixture. 2.1.1. For headlamp with the outside lens in glass: A mixture of water and polluting agent to be applied to the headlamp shall be composed of:
(a) 9 parts by weight of silica sand with a particle size of 0-100 µm corresponding to distribution prescribed in paragraph 2.1.3,
(b) 1 part by weight of vegetable carbon dust (beechwood) with a particle size of 0-100 µm,
(c) 0.2 part by weight of NaCMC1, and An appropriate quantity of distilled water with a conductivity of ≤ 1 mS/m.
2.1.2. For headlamp with the outside lens in plastic material: The mixture of water and polluting agent to be applied to the headlamp shall be composed of:
(a) 9 parts by weight of silica sand with a particle size of 0-100 µm corresponding to distribution prescribed in paragraph 2.1.3.,
(b) 1 part by weight of vegetable carbon dust (beechwood) with a particle size of 0-100 µm,
(c) 0.2 part by weight of NaCMC1,
(d) 5 parts by weight of sodium chloride (pure at 99 %)
(e) 13 parts by weight of distilled water with a conductivity of ≤ 1 mS/m, and 2 ±1 drops of surfactant. 1 NaCMC represents the sodium salt of carboxymethylcellulose, customarily referred to as CMC. The NaCMC used in the polluting agent mixture shall have a degree of substitution (DS) of 0.6-0.7 and a viscosity of 200-300 cP for a 2 per cent solution at 20 °C.
2.1.3. Particle-size distribution Particle size (in µm) Particle-size distribution in (%) 5 to 10 12 ±3 10 to 20 14 ±3 20 to 40 23 ±3 40 to 80 30 ±3 80 to 100 9 ±3
2.1.4. The mixture shall be fit for applying to the headlamp by the spray gun specified under 2.3. below. The mixture shall be used not earlier than two hours and not later than 24 hours after preparation. It shall be given into the gun immediately before use.
Test mixture. For headlamp with the outside lens in glass: The mixture of water and a polluting agent to be applied to the headlamp shall be composed of: 9 parts by weight of silica sand with a particle size of 0-100 µm, 1 part by weight of vegetal carbon dust (beechwood) with a particle size of 0-100 µm, 0.2 parts by weight of NaCMC 3/, and an appropriate quantity of distilled water, with a conductivity of ≤ 1 mS/m. The mixture must not be more than 14 days old.
Test mixture. 1.2.1.1.1. For headlamp with the outside lens in glass: The mixture of water and a polluting agent to be applied to the headlamp shall be composed of: 9 parts by weight of silica sand with a particle size of 0-100 μm, 1 part by weight of vegetal carbon dust (beechwood) with a particle size of 0-100 μm, 0.2 parts by weight of NaCMC3, and an appropriate quantity of distilled water, with a conductivity of ≤ 1 mS/m. The mixture must not be more than 14 days old.
1.2.1.1.2. For headlamp with outside lens in plastic material: The mixture of water and polluting agent to be applied to the headlamp shall be composed of: 9 parts by weight of silica sand with a particle size of 0-100 μm, 1 part by weight of vegetal carbon dust (beechwood) with a particle size of 0-100 μm, 0.2 part by weight of NaCMC3, 13 parts by weight of distilled water with a conductivity of ≤ 1 mS/m, and 2 ± 1 parts by weight of surface-actant4. The mixture must not be more than 14 days old. 3 NaCMC represents the sodium salt of carboxymethylcellulose, customarily referred to as CMC. The NaCMC used in the dirt mixture shall have a degree of substitution (DS) of 0.6-0.7 and a viscosity of 200-300 cP for a 2 per cent solution at 20 °C. 4 The tolerance on quantity is due to the necessity of obtaining a dirt that correctly spreads out on all the plastic lens.
Test mixture. The test mixture shall be composed of:
Test mixture. 2.1.1. For headlamp with the outside lens in glass: A mixture of water and polluting agent to be applied to the headlamp shall be composed of:
(a) 9 parts by weight of silica sand with a particle size of 0-100 μm,
(b) 1 part by weight of vegetable carbon dust produced from beech wood with a particle size of 0-100 μm, (c) 0.2 part by weight of NaCMC1, and
(d) 5 parts by weight of sodium chloride (pure at 99 per cent). An appropriate quantity of distilled water with a conductivity of ≤ 1 µS/m.
2.1.2. For headlamp with the outside lens in plastic material: The mixture of water and polluting agent to be applied to the headlamp shall be composed of:
(a) 9 parts by weight of silica sand with a particle size of 0-100 μm,
(b) 1 part by weight of vegetable carbon dust produced from beech wood with a particle size of 0-100 μm, (c) 0.2 part by weight of NaCMC1,
(d) 5 parts by weight of sodium chloride (pure at 99 per cent),
(e) 13 parts by weight of distilled water with a conductivity of ≤ 1 µS/m, and 2 ± 1 parts by weight of surface-actant.2
2.1.3. The mixture shall be fit for applying to the headlamp by the spray gun specified under paragraph 2.3. below. The mixture shall be used not earlier than two hours and not later than 24 hours after preparation. It shall be given into the gun immediately before use.
Test mixture. 1.2.1.1.1. For front fog lamps with the outside lens in glass: The mixture of water and a polluting agent to be applied to the front fog lamp shall be composed of:
(a) 9 parts by weight of silica sand with a particle size of 0-100 µm,
(b) 1 part by weight of vegetal carbon dust produced from beech wood with a particle size of 0-100 µm, (c) 0.2 part by weight of NaCMC4,
(d) 5 parts by weight of sodium chloride (pure at 99 per cent), and
(e) An appropriate quantity of distilled water with a conductivity of S < l µS/m. The mixture must not be more than 14 days old.
1.2.1.1.2. For front fog lamp with outside lens in plastic material: The mixture of water and polluting agent to be applied to the front fog lamp shall be composed of:
(a) 9 parts by weight of silica sand with a particle size of 0-100 µm,
(b) 1 part by weight of vegetal carbon dust produced from beech wood with a particle size of 0-100 µm, (c) 0.2 part by weight of NaCMC4,
(d) 5 parts by weight of sodium chloride (pure at 99 per cent),
(e) 13 parts by weight of distilled water with a conductivity of S < 1 µS/m, and
(f) 2 ± 1 parts by weight of surface-actant.5 The mixture must not be more than 14 days old."
Test mixture. 1.2.1.1.1. For headlamp with the outside lens in glass: The mixture of water and a polluting agent to be applied to the headlamp shall be composed of: 9 parts by weight of silica sand with a particle size of 0-100 μm, 1 part by weight of vegetal carbon dust produced from beech wood with a particle size of 0-100 μm, 0.2 parts by weight of NaCMC4, and 5 parts by weight of sodium chloride (pure at 99 per cent), an appropriate quantity of distilled water, with a conductivity of ≤ 1 μS/m. The mixture shall not be more than 14 days old.
1.2.1.1.2. For headlamp with the outside lens in plastic material: The mixture of water and polluting agent to be applied to the headlamp shall be composed of:
Test mixture. 1.2.1.1.1. For headlamp with the outside lens in glass: The mixture of water and a polluting agent to be applied to the headlamp shall be composed of: 9 parts by weight of silica sand with a particle size of 0-100 µm, 1 part by weight of vegetal carbon dust (beechwood) with a particle size of 0-100 µm, 0.2 parts by weight of NaCMC 3/, and an appropriate quantity of distilled water, with a conductivity of ≤ 1 mS/m. The mixture must not be more than 14 days old.
1.2.1.1.2. For headlamp with outside lens in plastic material: The mixture of water and polluting agent to be applied to the headlamp shall be composed of: 9 parts by weight of silica sand with a particle size of 0-100 µm, 1 part by weight of vegetal carbon dust (beechwood) with a particle size of 0-100 µm, 0.2 part by weight of NaCMC 3/, 13 parts by weight of distilled water with a conductivity of ≤ 1 mS/m, and 2 + 1 parts by weight of surface-actant 4/. The mixture must not be more than 14 days old.
