Keystone Products
We manufacture various grades of ultra-high purity quartz with a total impurity content of no more than 20 ppm, capable of meeting customer requirements for low aluminum, low iron, low titanium, and other specifications. Our products are widely used in applications such as crucibles, semiconductors, and new energy batteries.
Red Line – Hydroxyl Content of Unimin Products
Other Lines – Hydroxyl Content of Keystone Products