Homebrew PCBs

On Friday 02 March 2007 15:10, William Nelson wrote:
> Another problem is that when the copper melts it becomes highly reflective
> making it harder for the laser. Plus it reflects all over the place
> potentially causing other problems. Cutting metal is not as easy as it
> would seem because of the reflectivity.

Also, copper in particular is a very good reflector of the infrared light CO2 
lasers use.  CO2 laser cutting/engraving is easier with other metals.

This is a good web resource on lasers:
http://www.repairfaq.org/sam/lasersam.htm

-Sebastien