我发现玻璃胶已经干了，但我担心还会有甲醛残留。据了解，玻璃胶在固化过程中会释放出刺激性气体，而干燥后也可能继续释放甲醛，因为这些挥发性有机化合物（VOCs）需要一段时间才能完全逸出。一般来说，中性玻璃胶表面干燥大约需要2小时左右，而酸性玻璃胶可以在30分钟内凝固。但是，这些时间只是表面干透的开始，完整的干透过程通常需要48小时以上的时间。

对于修补工作，如果要在表面进行粘接，那么必须在玻璃胶表面干前完成。在涂抹分色纸覆盖某个区域时，一定要在外皮形成之前取走，以避免影响粘接效果。

Glassware adhesion process is a complex one. First, you need to ensure that the surface is clean and free of any oils or dust. Then, apply a thin layer of glass adhesive to the surface and press firmly until all air bubbles are removed. The adhesive will then dry and harden over time, forming a strong bond between the two surfaces.

It's important to note that different types of glass adhesives have different drying times, so it's essential to read the instructions carefully before starting your project. Additionally, make sure that the surfaces are properly prepared before applying the adhesive for best results.

In conclusion, while it may be tempting to rush through the process of fixing broken glassware with quick-drying adhesives like epoxy or super glue, these products can actually create more problems than they solve in terms of long-term durability and safety. By taking your time and using high-quality glass adhesives specifically designed for this purpose, you'll be able to create beautiful pieces that last for years to come without any concerns about VOCs or other harmful chemicals.

Now I know why my friend was always telling me about how important it is not only what we use but also when we use them especially when working on home improvement projects such as repairing cracked mirrors or windows where safety should always be our top priority!