Custom tile printing uses a variety of techniques including dye sublimation and ceramic-type laser toners. These alchemists used complex apparatus for distillation and sublimation. The heat of fusion is significantly smaller than enthalpy of sublimation. This cooling typically takes place as a result of phase changes (evaporation, melting, and sublimation). He described processes such as sublimation, reduction and distillation. Such a solid forms a vapor at low pressure by sublimation. Over time, accumulated snow metamorphoses, by sintering, sublimation and freeze-thaw. This leads to the following approximate sublimation enthalpy. Loss of glacier mass is caused by both melting and sublimation. Once formed, the compound can be purified by sublimation or distillation. The glaciers lose mass through both sublimation and melting. Sublimation and deposition also occur on surfaces. Naphthalene is used in engineering to study heat transfer using mass sublimation. Ablation is a process that includes sublimation and erosive wear of glacier ice. The anhydrous compound can be purified by sublimation in vacuum.