Suitability of Measuring Tools for Raw Ingredients: Plastic vs. Glass/Ceramic
Question
I am formulating cosmetics and need to measure raw ingredients. Is it safe to use plastic measuring cups/spoons for a very short time (less than 5 seconds)? The staff previously recommended ceramic. Can glass also be used instead of ceramic?
Answer
Regarding your question about using plastic measuring cups/spoons for a short time:
Based on the previous discussion, while the contact time is very brief (as you mentioned, less than 5 seconds), there is still a potential risk of reaction between some concentrated raw ingredients and plastic. This risk depends on the specific ingredient and the type of plastic used.
To completely eliminate this potential concern, the staff recommended using non-reactive materials like glass or ceramic for handling ingredients, including measuring.
Therefore, while a very short contact time might reduce the likelihood of a significant reaction, using glass or ceramic measuring tools is the safest practice recommended to avoid any potential issues, even for brief moments.