They do not suffer from the same type of inherent light-sensitivity that albumen prints do. These should be completely safe to copy using modern flatbed scanners. The Ambrotype and Tintype images are closely related by the process used to form the image. They both share a collodion image, but differ in the material used to support the image. The ambrotype is a collodion on glass image and the tintype is a collodion on metal image.
Collodion is a liquid used to suspend the image-forming silver on the glass or metal plate.
The albumen combines with silver in the image forming process to create organic materials that make the image suceptible to damage by light. The colloidion image does not contain these elements. Although well-made paper can last many hundreds of years, care muste be taken to protect it from the elements, insects and pollutants. The glass image support of the Ambrotype is impervious and the iron image support used in the tintype is only subject to rusting. Most of the prequisits for deteriotion presetn in the albumen image and mount are not present in the collodion image.