AQMD does not have the data to answer this question. Depending on the job, depending on the characteristics, UV inks have some characteristics that do not always meet the customers' needs. The majority of VOC emissions is not from inks. Applicability of UV inks depends on substrates, products type and product quality. Solvents are used to clean up both water-based and UV inks presses.
Some printers claim that they use less solvent to clean a water-based ink press than a UV ink press.
Some printers claim that they use more. Separating out a source category is contrary to EPA position because that gets into the questions of transfer technology and costs. However, in the minor source guidelines, we have the ability to do that under state law. However, I have not seen a lot of effort in incorporating UV technologies or control technologies in the printing industries. That is something that the group should look at.