Carl,

If the puncturing ball were an issue, I'm sure we would have heard about a recall long before now.

I did do the long term shake, which produced a little more spray than I have been getting, but still glogged within seconds.

I pryed the top of the can away until I heard a hiss. The can was hissing away in my photo-resist washout basin when I left, so in the morning I should have a pressureless can.

David Takes
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Carl
The old style can would become dented where the ball struck the inside of the can - the can became thinner and thinner evertime you shook it up. The can I had explode let go where the ball had made dents in the can. I have never used the "new improved can" and have no experience with it. They stopped making the old can for a while before the new one came out - I would guess that might have been part of the reason.

Well, it worked. I had a pressureless can in the morning, pulled the rest of the top off, and now have some useable material.

I appreciate all of the approaches that everyone shared in this thread. It is amazing what one can learn from the diverse experience and practices of others. I guess that what makes this place so valuable to me.

Carl,

Sorry for the delay in responding I was out of the office for the last ten day's.

Joe hit it right on the ball dented the older cans and that is where the puncture happened. They used a larger ball and thinner cans in the older model cans and that could have been the reason for the change.