Medium Colour Darkening Resins are two‑component epoxy‑based resin systems formulated to moderately enhance and darken the natural colour of granite and other stone surfaces while also providing crack filling and improved surface gloss during stone finishing processes. These resins penetrate into the stone’s pores to deliver a balanced colour enhancement that enriches the stone’s appearance without overly darkening it, making the natural patterns and hues more vibrant and consistent. They are typically applied using PE foam sheets for even absorption and smooth results. Popular variants include Dark 778, B‑104, and Dark 50, each tailored with specific mixing ratios and viscosities to suit different stone types and finishing requirements.