Not exactly an electronics question, but I know some lighting gurus hang out here. (Google hasn't been any help so far.)
What is the stuff used as the coating on typical incandescent "soft white" bulbs? I gather that the non-soft-white are simply acid etched on the inside of the envelope, but the soft white have a separate powder applied somehow. What is this stuff chemically? What makes it stick? (It seems pretty fragile if you touch it on a broken envelope piece.)
Thanks!
Bob Masta dqatechATdaqartaDOTcom D A Q A R T A Data AcQuisition And Real-Time Analysis