Film thickness of four disclosing media.

The use of disclosing media has been recommended to enhance the fit of castings. This study evaluated the film thickness of four disclosing media: (1) disclosing wax, (2) Net spray, (3) G-C Check Fit material, and (4) Extrude polyvinylsiloxane (low viscosity) impression material. ADA Specification No. 8 for zinc phosphate cement gives a maximum film thickness for the cement that was used as the control for these four media. The results demonstrated that the film thicknesses of all four disclosing media were less than the 25 microns maximum allowed for zinc phosphate cement.