soft-spoken adjective. âº usually âspeaking in a âquiet âvoice: a soft-spoken, âunderstated âstyle. (Definition of soft-spoken from the Cambridge Academic Content Dictionary Â© Cambridge University Press).
The laser drilling process involves the use of an infrared laser (of surgical grade at a wavelength about 1064 nm) to bore very fine holes (less than 0.2 millimeters or 0.005 inches in diameter) into a diamond to create a route of access to a black carbon crystal inclusion.
For drilling holes in plates, fused glass and dense, hard sea glass we recommend using a small diamond core drill. These are available in sizes from as small as 1mm. DO NOT use diamond drill bits on metal or soft wood. These materials are too soft and will cause the diamonds on your drill bit to clog up. When drilling holes in soft metals and wood use High Speed Steel drill bits (HSS) and for drilling holes in hard metals use Carbide Drill Bits.