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Heritage Science
Fig. 2 | Heritage Science

Fig. 2

From: Rapid identification of cellulose nitrate and cellulose acetate film in historic photograph collections

Fig. 2

Photographic images showing examples of characteristic deterioration used to identify known cellulose nitrate and cellulose acetate samples that were analysed. They have been graded based on the signs of physical and visible deterioration outlined in Table 1.  a Cellulose acetate showing level 2 blue coloured anti-halation dye separation deterioration (b) cellulose acetate showing level 6 channelling deterioration (c) cellulose nitrate showing level 2 iridescent mirroring (c) cellulose nitrate showing level 4 amber discolouration

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