Part of Kerley Ink's "secret" to being able to produce good quality inks at reduced prices is the fact that we buy in volume. Most raw materials are brought in via truckload or tankerload, helping to assure lowest cost possible. Every morning, a new tanker comes to deliver oil or solvent into Kerley's 50,000 gal (200,000 L) underground tank farm. Kerley Ink uses large quantities of lube oil, soy oil and narrow-cut hydrotreated petroleum distillates.