The past few years have been extremely challenging in terms of supply of key raw materials for inks and their ingredients. Suppliers in China have been closed temporarily or permanently due to tightening environmental regulations. In 2018, the shuttering of a key intermediate for photoinitiators creates a shortage of TPO and TPO-L, leaving ink companies scrambling to find materials for UV inks and coatings, often having to pay much higher prices for what they could find. As a result, many leading ink manufacturers have looked to diversify their supplier base.   The tragic explosion at Jiangsu Tianjiayi Chemical in China in March serves as a reminder of the need for tight regulation in China as well as concerns over doing business in the country.   On March 21, Jiangsu Tianjiayi Chemical, a pesticide plant in the Xiangshui Chemical Industrial Park in Chenjiagang, had a massive explosion. The pictures that can be found on the Internet show the damage to the plant. The worst of