New technology has aided the study of the fragile materials, making it more easily accessible.

On occasions offices may require pupils to use copies, especially of popular or fragile material.

Some of these fragile materials have also been treated to wear well in all weather.

I also like to make use of fragile materials and really stretch the process.

"We wanted to make sure our most rare and fragile materials are handled with a lot of care," she said.

For special purposes, and also the holding of fragile materials, chucks are available with six or eight jaws.

This has caused some permanent damage to the fragile material.

Simple conservation of these fragile materials can be carried out by the adventurous amateur.

I am also thinking about the preservation of fragile material that can be destroyed if it is not taken care of.

These days found objects are used by many artists, but rarely do they rely on such fragile materials.