ROET VOOR LAKKEN EN VERVEN.

摘要

There is prepared carbon black having the following properties: Primary particle size nm 35-120 BET surface area m2/g 10-50 Iodine adsorption mg/g 10-55 Volatile/content % 2-8 pH value 3-6 Acidity ml n/10 acid 2-16 per 100 grams of carbon black DBP number ml/100 grams 40-140 The carbon black is useful in producing gray lacquers, multi-colored lacquers and in making low viscosity and storage stable preliminary pastes suitable for use in lacquers.