In addition to the radioactive deterioration that occurs in the case of
radioactive (tritium, radium) dials (both the deterioration of the lume and
the "radiation burns" that occur on the dial underneath the hands, there is
also natural deterioration of any paint due to exposure to moisture,
sunlight, heat, humidity, etc. and variations in the original paint and
lume formulas. This varies from watch to watch, so the dial of Watch A may
remain in very good condition even though it has been used on a daily basis
and Watch B, which is new old stock, may nevertheless be yellowed, spotted,
etc. - if the hands remain in one place there may be a "shadow".
"Bladerunner" <bladerunner
...@yahoo.co.uk> wrote in message
...
>I noticed that some watch models have dial deterioration more than others
> (regarding luminescent - glow ing dark markings on them)
> Maybe I don't have enough expirience but seems to me that, that is
> happening
> only on some watches - let's say models who have large "spot" hour
> markings
> on dial (mostly diver's watches)
> I watching some Heuer super professional on Ebay and they ALWAYS have
> deteriorated luminuous markings (small black spots in large quantities -
> like a fungus or something??!!)
> Friend of mine have TAG Heuer described model (bought new - some 8 years
> ago) and also dial begin to deteriorate... - watch was(is) NEVER opened...
> currently 5min/24h late....
> I have some old Casio Quartz diver AL-520, I think - my luminuous spots
> also
> deteriorated... (outer borderline of circle)
> Anyone know what causes this???
> P.s. Everything OK with my Seiko 6309-7040 '83 - original dial I think...
