Black Walnut shell is very thick and hard, while English walnut shell has a thinner, softer shell. Black Walnut shell has little-to-no pith, and English walnut shell has considerably more lightweight, soft pith or membrane.
Most shell is bagged in 50 lb. 3-ply paper bags. Normally, 40 bags are stacked on a 40” x 48” 4-way hardwood pallet. Other packaging options include a 2000 lb. mini-bulk bag.
The most common sizes are 8/12, 12/20 and 20/30. However, there are many variables in blast cleaning, and the exact size used depends on application. We recommend you review a sample and try a test run, if possible, to get the best size and quantity needed for your application.
Frequently, 80 to 100 PSI is used. The exact pressure depends on the type of surface being cleaned (metal, wood, stone, etc.), the material being removed from the surface, and the type of finish desired.
No, Black Walnut shell is an environmentally friendly product—completely natural, organic material.
Regular blast cleaning equipment works very well with Black Walnut shell.
This depends on many variables like surface type, the material being removed, whether you can reclaim and reuse, and the final surface finish desired. We recommend you review a sample and try a test run, if possible, to get the approximate cost per square foot for your application.
Approximately 1–2 lbs. per square foot.