UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post - Some advice on a Smiths electric clock please

Brigham · 2nd Apr 2020, 9:43 am

The luminous paint is made up of two parts; the radioactive base, and a fluorescent part which glows under the stimulus. This is the part which wears out.
You could try a modern fluorescent paint; it could well be sensitive to radiation. There will doubtless be more than half the original radiation available, even in a few thousand years' time.

2nd Apr 2020, 9:43 am	#3
Brigham Octode Join Date: Mar 2006 Location: Co. Durham, UK. Posts: 1,117	Re: Some advice on a Smiths electric clock please The luminous paint is made up of two parts; the radioactive base, and a fluorescent part which glows under the stimulus. This is the part which wears out. You could try a modern fluorescent paint; it could well be sensitive to radiation. There will doubtless be more than half the original radiation available, even in a few thousand years' time.