Preservation

The sample which you got with hard-earned is spoiled when you don't have an attention. Have you seen the sample which was discolored in the front of a restaurant?

To preserve your samples in long time, be careful of the following matters.

Avoid direct sunlight - If the sample got tanned it's color is changed
Don't touch with dirty hands - It's one of causes of discolor when the sample have been gotten your secretion
Keep away from a plastic eraser - It may be combined with a plastic eraser
Prevent to be covered with dust - It may be unable to remove a dust

It's good that you have a showcase for your sample.