The filament required for 3-D printing have always been costly, but that should start to change soon.
3-D printer prices are steadily dropping in an attempt to woo hobbyists, but there's still a costly barrier to mainstream adoption: 3-D printer "ink."
Plastic filament, the standard material used by 3-D printers typically ranges in price from $25 to $45 for a kilogram depending on the quality and manufacturer.
That's a huge markup over the $2-per-kilogram cost of the plastic pellets used to make the filaments. Manufacturing and research and development account for some of the filament's added cost over the original materials.
But even when taking those added costs into account, the price of filament is artificially inflated, according to Jon Goitia, an engineer for 3-D printing company BQ Readers.
That's why a handful of companies, including BQ Readers, are trying to drive filament costs down.
Full article here: Filament