One of the more interesting but less well-known 3D printer manufactures is Sindoh.
bluesint
100% Reusable Bluesint PA12 Powder Service Now Available
Materialise announced the broad availability of their 100% reusable powder 3D printing service, Bluesint PA12.
3D Printing With 100% Recycled Powder
Materialise has introduced Bluesint PA12, enabling 3D printing with 100% recycled powder.