[alt-photo] Re: lead white as ground

[Alberto Novo]

>> below the action limit for the standard of 0.03 mg/m3.
> 
> 0.03 mg/m3 is below the threshold for 8 hours! 

I apologize, that's true: Action Level is 30 µg/m3, and it is normal to be 
about 1/2 the PEL.
http://www.osha.gov/pls/oshaweb/owadisp.show_document?p_table=standards&p_id 
=10030 

Alberto
www.grupponamias.com
www.alternativephotography.com/wp/photographers/rodolfo-namias-group