Complex sentence: Once the process achieves even penetration, workers slowly raise the float's pH in a process called basification, which fixes the tanning material to the leather--and the more tanning material fixed, the higher the leather's hydrothermal stability and shrinkage temperature resistance.
Split into simpler sentences: Once the process achieves even penetration, workers slowly raise the float's pH in a process called "basification". Basification fixes the tanning material to the leather--and the more tanning material fixed, the higher the leather's hydrothermal stability and shrinkage temperature resistance.