Methods and processes for making granite colo liquid: 1. Dissolving the ferric chloride by water and add with some activator to make granite color liquid. 2. Immersing the granite completely in granite color liquid. 3. Remember cleaning after soaking for sometime, and then the red granite will appear after drying out. Should be paid attention to: 1. Concentration of granite color liquid: different concentrations will get different granite color effect. It all depends actual circumstances, the general concentration 20% is the best. 2. Full soaking time: have sufficient time, short time make the granite color worse, but long time make the work efficiency low.