A study on the effects of rose flowers (Rosa rosa) as a pH indicator in edible food packaging film / Azmira Adam Malek

A natural pH indicator is in a high demand by the industries especially in food industry. This is because a natural ones are cheap, have simple procedure and consumer-friendly which in other word is safe to consume and use. In food packaging, it is important to have these elements where pH indicator can prevent and detect food spoilage. To have a natural pH indicator, Rose flower (Rosa rosa) is been use as natural resources in this project. Rose flowers contain anthocyanins that cause color changes of other substances. To extract these, three methods is been done to get significant amount of extracts in order to be mixed with edible food packaging film. The three methods are solvent extraction by using citric acid, super critical fluid and hydrodistillation. The edible film was then analyzed its physical and mechanical properties and tested with bread. The observation and the result of edible film are good and was a success.