Great all-round white, not just for use as a primer. It's a 50:50 mix of lead white and titanium, giving the benefits of lead (easier mixing, a warmer tone and better film-forming properties) and those of titanium (greater opacity, brightness and slower drying). Lead dries too fast for me, making alterations to the painting difficult after the first day or two, but this has the perfect drying time for my way of working. This is currently my go-to white. Reasonably priced as well.