This material is quite high in iron thus the powder is a deep red color and quite messy to work with.
While redart can be used as a source of iron in high temperature bodies, it will produce brown rather than red coloration. This is because the fluxes are intimately mixed with the iron and fuse it to a darker color. To get red at higher temperatures you must use refractory clays with iron or iron bearing fireclays.
- Digital Fire ceramic materials database
For excellent, step-by-step instructions on how to use Redart to make seed balls for your butterfly garden, check out this incredibly useful site: Lepitoptera Buffet - Make Seed Balls for Your Butterfly Garden