We use screen printing process to make lawn bag signs. Each colour is printed separately through a special silk screen. If we to print 2 colour image, we make 2 separate silk screens (for each colour). So, if you need 2 colour signs, we have to print these signs twice, with 3 colour design we print the same order 3 times etc. If you think that 2 colour print is too expensive, why not to change your design to one solid colour print and that will reduce the price significantly.