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Investigating Or Analyzing Materials By The Use Of Magnetic Means
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Claims (1)
3 Формула изобретени Способ получени магнитных порошков путем размола и смешени ферритов или металлического железа с растворителем, отлича-5 юш,ийс тем, что, с целью более четкого вы влени следов при дактилоскопии, смешение 4 порошка производ т с поверхностно-активными веществами, например стеариновой кислотой концентрации 0,01-4,0 вес. %. Источники информации, прин тые во внимание при экспертизе: 1. Патент Японии № 48-24246, Кл. ЗОЕ 11, 1973 (прототип).3 The invention The method of obtaining magnetic powders by grinding and mixing ferrites or metallic iron with a solvent, differs -5 yush, in order to more clearly detect traces during fingerprinting, the mixing of 4 powders is carried out with surfactants, for example stearic acid concentration of 0.01-4.0 weight. % Sources of information taken into account in the examination: 1. Japan patent No. 48-24246, Cl. ЗОЕ 11, 1973 (prototype).
SU2050105A1974-08-051974-08-05
The method of obtaining magnetic powders
SU542949A1
(en)