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Olia Hårfarge Metallic Silver 9.11
1-Naphthol is categorised as "Added colour" while Blue 1 is categorised as "Added colour". They serve different functions in skincare formulations.
In most cases, these ingredients can be used together. However, always patch test and introduce new ingredients gradually.
1-Naphthol is found in 1 products, while Blue 1 is found in 12 products in our database.
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