Why Do Colored Candles Burn Faster Than White Ones?

Question:
Do coloured candles burn faster than white ones ?

Purpose :
I'm doing this experiment to find out if the white candles burn faster than the colored candles. This will help everyone in life because if u want to put candles on your cake you might want to use the candles that burn slower, because by the time you blow your candles you don't want candle wax on your cake! The birthday cake doesn’t really take that long but if there was blackout you would want to buy the candle that burns slower since you want it to last longer. So the candle that burns slower would be a better choice.

Hypothesis:
In my opinion I think that the white candles will burn slower than the coloured. I think this because of all the chemicals that
The candles back then smelled bad when they were burned unlike nowadays. Now there are added fragrance to the candles.
Candles are the oldest source of light and throughout time they have gotten better and are not only for the use of light but for decorations, religious use, and for birthday cakes.
The white candles will burn slower because the candle dye (since it has chemicals) colours also affect the burning rate . Since the white is plain it will burn slower and the rest are dyed so they will burn faster. The burning rate also depends on how hard the wax is.

Material:
1 white
(tested every 5 min) table: time white yellow green red
10:37-10:42
3.5cm
5.3cm
5.3cm
5.3cm
10:54-10:59
3.2cm
4.2cm
4.5cm
4.5cm
11:02-11:07
3.2cm
4cm
4.2cm
4cm
11:10-11:15
3cm
3.2cm
3.5cm
3.4cm
TOTAL
cm melted:
0.5cm
2.1cm
1.8cm
1.9cm

Results :
My results were that coloured candles do burn faster than white. My hypothesis was correct because the coloured candles burned faster than the white candle from all the research this is because of the dye the candle had and also it depends on the wax how hard it is if it's hard then it takes longer time for it to melt. White candles don't have dyes but coloured candles do that also affect a little on the burning rate. The yellow candle burned the fastest and the white was the slowest. Next time in this experiment I will try to use different coloured candles, and measure for more than 5 mins each candle.

Conclusion: Overall in my experiment I found out that in the future I should buy white candle. The yellow candle burned the fastest and white was the slowest. Remember when buying candles for the future (blackouts) buy white candles and I would also look for a good quality brand when buying candles because that will also affect the burning