A paper-based Colorimetric Indicator Label using Natural Dye for Monitoring Shrimp Spoilage

A. Listyarini, W. Sholihah, C. Imawan

Research output: Contribution to journalConference articlepeer-review

23 Citations (Scopus)


Shrimp is a type of perishable food. This study developed a simple indicator label using colorimetric method for monitoring shrimp freshness. This indicator label was made from natural dye extract of Ruellia simplex flowers which immobilized on cellulose paper by dip coating method. The indicator labels were used for examining freshness of shrimp. In this experiment, shrimp were stored in sealed bottles that have been labeled using the indicator and stored at 13 °C, 25 °C, and 40 °C for a certain range of time. Color changes of the indicator labels were observed using digital photography after shrimp storage for 0 h, 2 h, 17 h and 24 h. The color changes that occur were quantified and analyzed using the ImageJ program. The color of the indicator label when detecting the fresh shrimp was pink and after the shrimp spoilage began, the color of the label changed to purple and then became yellow when the shrimp is badly spoilage. The color change rates of label indicator increases as the shrimp storage temperature increased. These results indicate that this label indicator can be used as an indicator of the freshness of shrimps and it is not toxic and safe for food.

Original languageEnglish
Article number012045
JournalIOP Conference Series: Materials Science and Engineering
Issue number1
Publication statusPublished - 12 Jun 2018
Event5th International Conference on Advanced Materials Sciences and Technology, ICAMST 2017 - Makassar, Indonesia
Duration: 19 Sept 201720 Sept 2017


  • Colorimetric
  • Ruellia simplex and shrimp spoilage
  • dip coating


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