Hi Mike, The glass coloring just filter what the tube emits. If the wavelength that the filters let pass is emitted by the tube (like green for green-turquoise VFDs, red for Nixies) then the coloring will enhance the contrast. And look good. The filters will not change the color of the light emitted, like making a Nixie to be seen as emitting green light.
Regards On Oct 26, 9:51 am, mike <[email protected]> wrote: > what color can the tubes be made to glow > > thanks > mike > > On Oct 26, 3:56 am, Per Jensen <[email protected]> wrote: > > > > > > > > > Pictures !! > > > I want to see the dipped tubes :-) > > > // Per > > > Den 26/10/2011 kl. 10.14 skrev Nick <[email protected]>: > > > > The reason I was asking about photographing VFDs is that I've recently > > > been playing with re-coating tubes whose original coating is in poor > > > condition or is not the wanted colour. > > > > John Smout, as always, was a fount of knowledge on these matters and > > > suggested FEV (French Enamel Varnish) - much used in the stage & > > > screen industries - essentially this is French Polish with a ready- > > > mixed in stain. The solvent for FEV (and French Polish) is methylated > > > spirits. > > > > I therefore ordered 250ml of Mauve from > > >http://www.goldleafsupplies.co.uk/acatalog/V_French_Enamel_Varnish.html. > > > > The subject tube was cleaned with methylated spirits and the tube held > > > upside-down in a suitable socket. I then dipped the tube into the FEV > > > up to the desired line, then withdrew it and hung it up to dry (about > > > 30 minutes). The coat was blemish-free and completely even with a > > > uniform colour depth. Granted, the tube I was testing this on had a > > > nipple which acts as a focus for drips draining off, but I see no > > > reason why this wouldn't work with smooth-topped tubes. > > > > After a few hours the coating is tough and stands a reasonable amount > > > of man-handling - the colour can be deepened by applying multiple > > > coats - the whole new coating can of course be removed with the FEV > > > solvent - methylated spirits again. > > > > FEV is available in a very wide range of colours - it is expensive, > > > but you don't need much. I had a whole bunch of rather rare VFDs with > > > damaged coatings - now they are like new. -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. To post to this group, send an email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/neonixie-l?hl=en-GB.
