Volcanic Ash (Pumice)

Volcanic Ash (Pumice)

Volcanic Ash (Pumice)

Clay & Minerals

Price: $1.25
SKU:
RMVOL
Weight:
1.00 LBS
Bulk Pricing:
Buy in bulk and save

Bulk discount rates

Below are the available bulk discount rates for each individual item when you purchase a certain amount

  • Buy 5 - 9 and get $0.25 off
  • Buy 10 - 24 and get $0.40 off
  • Buy 25 - 49 and get $0.50 off
  • Buy 50 or above and get $0.60 off
Adding to cart… The item has been added
Packaging:
50# bag

Pumicite is composed of minute particles of volcanic glass. It is easily processed due to its fine in nature. Deposits result from volcanic eruption blowing large quantities of material into the air which settles in layers, sometimes in thicknesses that compress to 30 feet or more! Volcanic ash particles are non-crystalline due to the quick cooling during formation. This material thus has the melting properties associated with a glass or frit (rather than melting at a specific temperature, it softens over a range of temperatures). The chemistry is sometimes similar to granite or ryolite. Raw color varies and deposits can be found over wide areas of the central and western areas of North America (and world wide). Volcanic ash materials can vary widely in their chemistry, so it is difficult to propose a representative analysis. Some types of volcanic ash are balanced enough chemically that they can be used in amounts to 50% or more of the glaze batch. Most require the addition of fluxes and kaolin (to supply Al2O3) to form a glaze with reasonable firing and suspension properties.

Related Products

!