The black part is more difficult to make, dyed with maple leaves, but if the maple leaf juice is not strong enough, the dyed glutinous rice is gray. If you want to dye glutinous rice black and shiny, you should pay attention to two points: first, you must mash the maple leaf and its stem in a mortar and then put it into the water. The ratio of maple leaf to water is about1:1.5; Second, after the maple leaves are soaked for a day and a night, the water turns yellow-green. At this time, take out the leaf residue and filter it. As a black dye, water is boiled in a pot. Remember not to boil water. When the water temperature is 70 to 80 degrees Celsius, you can put the glutinous rice into the pot, stir it slowly and dye it. Glutinous rice will gradually change from light blue to indigo blue and finally to black. It is very important to master the water temperature. Once the water is boiled, the glutinous rice will not be dyed black.
Purple, red and yellow dyes are all made in the same way. Picking, cleaning and cutting yellow flowers, red and blue grass and purple and blue grass, then putting them into a pot, soaking them in clear water and boiling them with high fire. Before long, the color of the water began to change, and then the water was filtered out as a dye. Rub the leaves in the pot hard and mix them with the dyes filtered out before cooking. The filtered water is also used as a dye, and the leaves must be boiled at least twice to get the color out easily. Then soak the filtered water in the rice, preferably overnight, so that the glutinous rice can be well colored.