Occurs when heat-sensitive materials such as wax, vinyl and some adhesives are warmed – e.g. on a hot day, in direct sunlight or under hot exhibition lights.
![](https://aiccm.org.au/wp-content/uploads/2008/03/Softening.jpeg)
Occurs when heat-sensitive materials such as wax, vinyl and some adhesives are warmed – e.g. on a hot day, in direct sunlight or under hot exhibition lights.