After 30 years we've had to redevelop the Resist due to changing raw materials.  It's a long and slow process with many formulas failing with the newest materials

UPDATE 2024 - we FINALLY have a viable BETA test of a Resist that performs as well as the past one. We have free samples for customers to test as we await final shelf life testing.  Just add a BETA test to your cart.  No charge (shipping is extra though).