Resistors. Color marking. Reference data
Encyclopedia of radio electronics and electrical engineering / Reference materials
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In accordance with GOST175-72 and the requirements of IEC Publication 62 (International Electrotechnical Commission), color marking is applied in the form of 3, 4, 5 or 6 color rings. The marking rings must be shifted to one of the conclusions or the width of the ring of the first character must be twice as large as the others, which is not always observed in practice.
Examples of color markings of various companies that differ from the above are given. here. Instead of color rings, color dots may occur, but the marking principle is the same.
Publication: cxem.net
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