Tissue papíry a tissue výrobky - Část 16: Stanovení optických vlastností - Neprůhlednost (papírová podložka) - Difuzní metoda odrazu (Norma k přímému použití jako ČSN).
NORMA vydána dne 1.9.2015
Designation standards: ČSN EN ISO 12625-16
Classification mark: 500371
Catalog number: 97720
Publication date standards: 1.9.2015
The number of pages: 24
Approximate weight : 72 g (0.16 lbs)
Country: Czech technical standard
Kategorie: Technické normy ČSN
This part of ISO 12625 specifies the testing procedures for the instrumental determination of the opacity of tissue paper or tissue products by diffuse reflectance using a paper backing. This part of ISO 12625 contains specific instructions for the preparation of test pieces of single-ply and multi-ply products, where special preparation/procedures might be necessary. It can be used to determine the opacity of tissue paper and tissue products containing fluorescent whitening agents, provided the UV content of the radiation incident on the test piece has been adjusted to conform to that in the CIE illuminant C using a fluorescent reference standard provided by an authorized laboratory as described in ISO 2470-1. This part of ISO 12625 is not applicable to coloured tissue paper and tissue products which incorporate fluorescent dyes or pigments