Soluble waxes are one of the products that allow the investment caster to do what makes investment casting truly unique. Unfortunately soluble waxes have not received the attention they deserve in proportion to the important role they play in the process. Soluble waxes are often relegated to the oldest and least functional machines and are regarded as messy, temperamental to inject and difficult to clean. The resultant soluble wax patterns are often filled with defects, cracks and crazing that have to be repaired or re-shot at great expense. Many soluble wax formulas in use today were formulated over 25 years ago and still contain fibers and/or fillers which directly contribute to the problems previously described. A wish list of desirable soluble wax properties includes no fibers, and rapid leach among others. That product is available today and when used with sound wax room practices the investment caster can realize increased productivity at the beginning of the casting process.