Do different types of reduction material give different effects?
The short answer is yes. The long answer is much more complicated! Here is a medium answer: Your reduction effects are certainly influenced by how much carbon is in the atmosphere that surrounds your pot. In other words, how much smoke your pot is quickly subjected to. Some materials have the potential to release more carbon than others. The condition of your material (wet, damp, dry) as well as the particle size as in the case of wood materials (sawdust, shavings, chips) can be important. The type of wood can also affect your results.