Factis erasers feature two popular varieties: P-12: General's Factis P-12 Plastic eraser is formulated for use with graphite on tracing papers and films. A non-abrasive and self cleaning eraser it removes graphite lines without ghosting. Latex Free. ES-20: General's Factis ES-20 Extra Soft White Vinyl Eraser is ideal for erasing charcoal, pastel, and graphite. Gentile enough to use on fine, handmade papers, or papers with a tooth. Ideal for shading and highlighting it can easily be cut down to smaller sizes. Absorbent enough to pick up oil paint from canvases. Latex Free.