We can see a lot of various printed materials, such as business cards, snack boxes, and book covers, in our daily lives, and since we see them a lot in our daily lives, there is a high probability that they will have fingerprints on them. Therefore, i...
We can see a lot of various printed materials, such as business cards, snack boxes, and book covers, in our daily lives, and since we see them a lot in our daily lives, there is a high probability that they will have fingerprints on them. Therefore, it is important to make fingerprints development on such coated paper. Printed materials such as business cards, snack boxes, and book covers are coated to prevent them from smearing or being erased. Additionally, these coated papers can be exposed to various environments, especially wet with water or exposed to various contaminants. Therefore, in this study, coated paper coated with laminating coating and UV coating methods, which are the most commonly used coatings, was selected as the sample. Fingerprints were left on the coated paper, the sample was immersed, and then ORO, regular black magnetic powder, and CA fuming were used. Fingerprints were made salient and the degree of salience between techniques was compared.
In this study, fingerprints were aged for 24 hours, 1 week, 2 weeks, 3 weeks, and 4 weeks, and then the fingerprints were revealed using ORO, regular black magnetic powder, and CA fuming. Fingerprints left on both laminating coated paper and UV coated paper showed the best results when revealed using powder and ORO, and in the case of fingerprints aged for 4 weeks, better results were obtained when powder was used rather than ORO. When fingerprints were revealed by CA fuming, no fingerprints were revealed except for those that had been aged for 3 weeks.
If laminating coated paper or UV coated paper is collected in the field, it is effective to use the powder method or ORO.