Bucktown Polymers EP200-V420 starting at $25/Kg. Available now in three speed grades.
Slow (-S) for most higher powered SLA and DLP printers where melting the vat surface or overcuring is an issue.
Fast (-F) for continuous or layerless and other higher powered DLP printers
Very Fast (-FF) for many of newer lower cost 405nm LCD printers that lose much of their curing energy in the LCD
EP200-V420 is available in 4 colors: Cyan, Magenta, Yellow and Clear