How the 60W MOPA laser cutting the silver and golden ?

Laser Power: 60W Marking Area(Lens): 175*175mm Engraving Depth:≤1mm 80mm Rotary Axis Laser Source: MOPA JPT M7; Repetition Rate Frequency : 1-4000kHZ; Pulse Duration: 2-500ns Application Advantage: Metal surface processing, peeling coating; Aluminum black marking; Semi-conductor&electronics industry applications; Large area engraving; Excellent marking effect on plastic or other sensitive material; Black and color marking on stainless steel. High-Rate of Electrical-Optical Conversion: up to 70%; Imported laser scanning system makes the marking speed up to 7m/s. Re-position precision is 2 years warranty. Customer and Technical Support; Easy Operation, English User Manual, VCD training video, software sending together with the machine. US Stock and Fast Shipping by UPS. 60W JPT MOPA M7 Laser Engraver 175*175mm Lens 80mm Rotary Axis Technical Parameters: Laser Power: 60W Marking Area: 175*175mm Max. Material Thinkness: 206mm Laster Source: JPT MOPA M7