Summary for red filter coating Discussion
Red filter coating is the key issue in this thread: David A. Ross asks how to find or make a suitable red coating for low-wattage incandescent lamps and, especially, a low-power neon nixie tube, noting that old nixies used a red filter to improve digit contrast. The only answer shown is from an unnamed responder who suggests trying a hobby supply store for the needed material. Because the excerpt is incomplete, no specific coating chemistry, application method, or product is confirmed in the thread. The practical takeaway is that a hobby or model-supply source may be the most likely place to look for a red filter coating or similar translucent red material for this kind of display use.
Q. I am looking for help finding or making a suitable coating for low wattage incandescent lamps and – more importantly – a low power neon lamp known as a nixie tube. There are sources for nixie tubes at reasonable prices but little if any information on the red filter coating that used to be applied to nixie tubes to improve the contrast of the digits being displayed. Anyone have any ideas or suggestions?
Thanks.
David A. Ross
hobbyist – Woodstock, Georgia, USA
2007
A. Try a hobby supply store for glass staining paint
[affil link]. I used some on dash illumination bulbs in my car one time. It will give you color but will reduce the intensity of the bulb some. Hope this helps.
ROD WALTERS
– DES MOINES, Iowa
2007