The best way to ensure the Duraglide bath is the correct concentration throughout the entire dipping process is to use a Kwik-Check machine to calibrate your dip. One of the benefits of using the Kwik-Check machine. You can pull a sample from the dipping bath and measure the PTFE content in a matter of seconds. If evaporation is causing the fluid to wander off-spec, then users can easily calculate how much carrier to add to the bath to bring it back to original specifications. It does this by measuring the specific gravity of the fluid and matching it to a data table. The Kwik-Check machine is calibrated to measure PTFE when the PTFE is suspended in the XF or XC carrier fluids. It measures PTFE in percent weight concentrations between 1% and 5% (+/- .25%).
Customers should add plain Vertrel™ XF or XC to “top off” the Duraglide coating. Adding plain, pure carrier would be the only way they could add carrier to their existing bath and be able to bring the formula back to original specifications.
The only limitation to this process is the purity of the bath. Dipping parts can result in the addition of water and/or contamination to the bath. This will change the specific gravity of the dipping fluid. That’s why we always recommend the parts be perfectly clean and dry BEFORE dipping and coating.