Color issue with Onion Extract in clear gel formulation
คำถาม
I am formulating a clear gel product using Onion Extract (Allium Cepa) at a low concentration (0.5%-1%). I have observed that the gel turns a yellow-brown color. Why does this happen, and what can I do to prevent or minimize this discoloration while keeping the gel clear?
คำตอบ
Botanical extracts, such as Allium Cepa (Onion Extract), naturally contain pigments that can impart color to formulations, even at low usage concentrations like 0.5%-1%. This is a common challenge when working with natural ingredients in clear bases like gels.
Unfortunately, it can be difficult to completely remove the natural color from an extract without potentially affecting its beneficial properties. However, here are a few general approaches you could consider to address the yellow-brown color in your gel formulation:
- Use a Masking Base: Instead of a clear gel, consider formulating with an opaque base, such as a white cream or lotion base. The opacity of the base can help to mask the color of the extract.
- Accept the Natural Color: In some cases, the natural color of the botanical extract is accepted as part of the product's identity, indicating the presence of natural ingredients.
- Check with Your Supplier: Since the color intensity can vary depending on the specific extraction process and source of the Allium Cepa extract, it would be best to consult directly with your supplier. They may be able to provide specific guidance on their product's color properties or suggest if a less colored version is available.
Without knowing the specific properties of the Allium Cepa extract you are using, it is challenging to provide a precise solution for achieving a clear gel.
