Distinguish the parts of the product to be examined
An item's base, facing, inserts and coatings may differ. The description must state which component a conclusion about material origin concerns. Examining a small accessible area does not always characterise every part of the product.
Which limitations should be stated
Extensive processing, colouring, restoration or wear may conceal the necessary features. In this situation, the availability of additional methods and the permissibility of intervention on the object are discussed. An exact species must not be asserted solely because it appears on an invoice or in an advertising description.
- How is the examined area identified?
- Which diagnostic features are actually available?
- What level of identification is substantiated?
- Have material origin and legality of circulation been considered separately?
Preliminary photographs help agree on the task, but feasibility of examination is decided with regard to the object's condition. The method and grounds for altering the item must be determined before taking a sample.
On this subject: A wood or leather product: what information is needed to identify the species.