Drawn-in scale - 1.2826
Treatment : spheroidised
Magnification : 10 : 1
Etching medium :
Sampling / Specification : surface of rod wire
Testing result :
in places are rests of scale on the wire surface
mottled surface with darker places after the drawing
Treatment : spheroidised
Magnification : 500 : 1
Etching medium :
Sampling / Specification : transverse
Testing result :
drawn-in scale 0,02 mm deep
in combination with small pinchers