Yes, fiberglass resin does need a hardener. The resin is a polymer that requires a catalyst, typically a hardener, to initiate the chemical reaction that causes it to solidify or cure. Without the addition of hardener, fiberglass resin will remain in a liquid state and never achieve its durable, solid form. The ratio of resin to hardener must be accurately measured to ensure proper curing and strength of the final product. This mixture ratio varies by product, so it's essential to follow the manufacturer's instructions. Adding too much or too little hardener can affect the resin's curing time, strength, and overall quality.

Direct dyes are a popular option for adding vibrant colors to the hair without the need for prior lightening for some shades. They deposit color directly onto the hair shaft without altering its structure, which means they're generally less damaging compared to permanent hair dyes that require a developer to open the hair cuticle. The absence of ammonia or a strong developer in direct dyes reduces the risk of hair breakage and dryness. However, the process of applying and maintaining vivid colors often necessitates frequent application, which can lead to dryness and some level of wear on the hair over time, especially if not properly cared for with conditioners and hair masks. It's also important to note that while direct dyes themselves might be less damaging, the pre-lightening process required for bright or pastel shades can be harsh on the hair. To minimize damage, it's advisable to use direct dyes on healthy hair and follow a nourishing hair care routine.

The best epoxy resin for you depends on your project needs. For artwork and crafts, ArtResin is highly recommended due to its UV resistance and non-toxicity. For DIY projects and woodworking, Pro Marine Supplies Epoxy Resin offers a high-gloss, durable finish. EasyCast is ideal for beginners due to its easy mixing and versatile use in small projects. Ensure to choose a resin with properties suited to your specific application, such as UV resistance, viscosity, and drying time, to achieve the best results.