Every export charcoal specification sheet lists ash content. This single number tells you a lot about charcoal purity and quality.
What is ash?
Ash is the non-combustible mineral residue left after charcoal burns completely. It comes from natural minerals in the wood and from soil or sand that may mix with charcoal during production and packing.
How is it measured?
A weighed sample is burned in a laboratory furnace until only ash remains; the residue is weighed and expressed as a percentage of the original weight.
Why it matters
- Higher efficiency: lower ash means more combustible material in the same bag.
- Cleaner experience: in shisha, heavy ash covers the coal and needs frequent tapping.
- Better industrial processes: some industries require low ash.
Typical values
Acceptable values vary by charcoal type, market and application, so buyers usually set them in the contract. The general rule: the lower, the cleaner.
Why ash rises
- Soil mixed in during production.
- Fines and dust not screened out.
- Poor binders or fillers in pressed charcoal.
A simple test
Burn a piece completely and compare the amount and colour of ash between samples from different suppliers. Little, light ash is a good sign.
We include clear specifications with our quotations. Request technical specs.
