Sun Exposure

[larryk]

I have an oversize screen that will not fir in my exposure unit and need to burn a large 12" number in it.... wanting to do it outside with the sun. 156 mesh. Can anyone give me a starting point for exposure time. Thanks, LarryK

[im_mcguire]

depends on emulsion, but I have done SP-1400 at 1 minute on a sunny day, and it worked well.

But, there are so many different variables.