Stuart McLachlan
stuart at lexacorp.com.pg
Tue Feb 12 17:53:53 CST 2013
Well, that's the way most of them are made, i.e. http://www.gadgetepoint.co.uk/prod-magic-candle-real-wax-colour-changing-candle.php The Magic Candle is an actual candle, with no batteries involved. The secret is its modern microelectronic technology. Next to the wick inside is an optical fiber that senses the light of the flame and activates the LED colour bulbs. http://aladdiescave.com.au/index.php?act=viewDoc&docId=11 Modern microelectronic technology allows the candle to emit a rainbow of constantly changing colours throughout the interior of the candle without dangerous, toxic dyes, chemicals or paints. The clever power scource is an environmentally friendly LED battery that can power the candle for more than 25 hours http://wiki.answers.com/Q/How_do_air_wick_colour_changing_candles_work Infrared light. There is an electronic kit at the bottom of the glass with and LED light on it which gives the illumination of colors. It is activated by infrared light. Infrared light, along with visible light, is given off by flames and incandescent light bulbs. http://www.airwick.co.uk/faqs-colour-change-candle.php How safe is my candle when you have batteries & electronics located in the base? The candle is completely safe it has been thoroughly tested. The batteries & electronics are housed in a separate compartment that is not in contact with the flame or heat. However: A google for "thermochromic candle wax" throws up quite a few patents such as: http://www.google.com/patents/EP1090977A2?cl=en The invention concerns a candle wherein the main body comprises (a) a solid combustible matrix, which may be a conventional wax or a solid clear gel formulation, and (b) a reversible color changing composition, preferably a thermochromic or photochromic composition, the components (a) and (b) preferably forming a homogeneous mixture. [0011] Upon lighting, the light or heat given off by the flame causes the reversible color changing composition contained in the main body to change in color, to loose color, or to become colored, at least in the area nearest the flame. On 12 Feb 2013 at 18:20, Arthur Fuller wrote: > Not in this case, Stuart, but nevertheless an inventive reply. I have > burned one all the way to the bottom of the glass and there were no traces. > I poured boiling water onto it (outside first so as not to break it) and > now it's a drinking glass. > > It's something they did to the wax. > > A. > _______________________________________________ > dba-Tech mailing list > dba-Tech at databaseadvisors.com > http://databaseadvisors.com/mailman/listinfo/dba-tech > Website: http://www.databaseadvisors.com >