However, problems were posed over time as the paintings were not true frescoes.

They are not true frescos but use the Gambier Parry process.

It is clear that true fresco, painted into a thin layer of wet plaster, was not used.

"I realized that only a true fresco could best complement the renovated chapel space."

They are true frescoes, painted on wet plaster so that the color chemically adheres to the surface, unlike the Egyptian versions.

Vasari had used true fresco, while Zuccari had painted in secco.

His Capitol frescoes were probably the first true frescoes to be painted in this country.

The first true fresco in the building was the work of Jean Charlot.

A true fresco is painted onto plaster that is fresh.

In Ancient Egypt, for example, many of the wall paintings were done on dry plaster and are not true frescoes.