Yes like the heat shield on the Apollo capsule, which ablated to take the
heat of re entry away. It gets more blurred when you look at the candle.
Some candles burn the impregnated wicks and the melting of the wax is
sacrificial as its only purpose is to hold the wick atop the rest of the
wick, so has to melt to achieve this. However I came across some candles
where the actual wax as it melts releases a substance that makes the candle
aromatic.
Brian

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"Bill Wright" wrote in message
...
On 17/01/2020 15:41, Jethro_uk wrote:


As this threads development shows, there's a distinction to be made
between "consumables" and "sacrificials" ?


Yes, a lot of people has misunderstood. 'Sacrificial' means that the item
is lost, damaged, eroded, etc IN ORDER TO PREVENT DAMAGE TO SOMETHING
ELSE.

Bill