Marco water color pencils oil colored set pencils 120/100 art professional coloring pencils color lead crayons painting supplies1. Lead core hardness is different. The lead core of oil based color lead is relatively hard, while the lead core of water soluble color lead is softer. 2. The properties are different. The refills of oil based color pencils are waxy, so they are insoluble in water. After painting with water based color pencils, you can use a brush to lightly dip the paint in water to dissolve the paint. 3. The effect presented is different. The color saturation of