Based on the search results, here is the information about nails by Tina:

• Positive: Nails by Tina is a nail salon that offers a wide range of high-quality nail services. They prioritize a safe and sanitized setting for their customers. They use top-grade products and offer plant-based nail polish. Customers have given positive reviews about the quality of their services and the longevity of their nail polish.

• Negative: There is no negative information about Nails by Tina in the search results.

• Ingredients or materials: There is no information about the specific ingredients or materials used by Nails by Tina in the search results. However, the search did reveal information about the potentially hazardous chemicals that can be found in some nail salon products. It is important for nail salon workers and customers to be aware of the chemicals in the products they use and to choose safer products whenever possible.