Capacitor Circuit Board Marking. From the pic i believe dark is negative. The last one is the multiplier and the first two are significant figures.
For example r1 for the first resistor c1 for the first capacitor ic1 for the first ic and so on. You can download a free eda tool such as eagle to play around. Use them to identify light or dark as negative.
These markings and codes indicate various properties for the capacitors and it is essential to understand them in order to select the required type.
Capacitors have a variety of marking codes on them. Its values are in picofarads. Markings of leaded tantalum capacitor. For example r1 for the first resistor c1 for the first capacitor ic1 for the first ic and so on.
