TechPan is very fussy with processing, and I doubt any B&W lab would do a good job with it. Don't worry, you haven't exceeded the luminance range of the film. I've got prints from TechPan with all shades from pitch black to pure white, and every shade of gray in between.(posted 8736 days ago)If you can't find Technidol, there is always Rodinal. I process TechPan in Rodinal at 24 deg C. Dilution 1:200, time 8 minutes. Agitation - once a minute. Works perfectly each time.