Then you'll be impressed: http://www.3m.com/us/office/advisory/DusterFAQs-fromInhalantDotOrg.pdf http://www.3m.com/us/office/advisory/DusterFAQs-fromInhalant...

Then you'll be impressed: http://www.3m.com/us/office/advisory/DusterFAQs-fromInhalantDotOrg.pdf http://www.3m.com/us/office/advisory/DusterFAQs-fromInhalant... ; http://www.3m.com/us/office/advisory/3MDustRemoverAv152aMSDS.pdf http://www.3m.com/us/office/advisory/3MDustRemoverAv152aMSDS... My understanding is that this is because a typical compressed air can could not actually withstand the pressured required to hold normal air, compressed.