Re: Making pt a non-physical unit

On Jan 15, 2010, at 10:33 PM, "Tab Atkins Jr." <jackalmage@gmail.com>  
wrote:

> That's what a hairline means.  It's just on the edge of visibility.

No it doesn't, unless your hair is very unusual. When I worked in  
print, we typically created hairlines that were 3/10 of a point (.004  
inches), output to film negatives at 2400 dpi at the time. It was  
thin, but we didn't have much call to create designs that people  
couldn't see.