Resistance to hydrocarbons. The outer face of these three samples shall then be lightly rubbed for one minute with a cotton cloth soaked in a mixture composed of 70 per cent n-heptane and 30 per cent toluene (volume per cent), and shall then be dried in the open air.
Appears in 20 contracts
Samples: wiki.unece.org, unece.org, unece.org
Resistance to hydrocarbons. The outer face of these three samples shall then be lightly rubbed for one minute with a cotton cloth soaked in a mixture composed of 70 per cent n-n- heptane and 30 per cent toluene (volume per cent), and shall then be dried in the open air.
Appears in 8 contracts
