[jon]

Hi! This is my first post, so be gentle.

I am a hotel engineer, and I've been using the nickel kit for several weeks now with excellent results, saving thousands in plating costs. So when my 12-year-old daughter needed a subject for her seventh grade science project, I thought plating would be a slam dunk. She could plate samples for various time periods and compare the deposition rate with theoretical values.

We carefully cut sheet brass into eight 1" squares. We used a micrometer with 0.0001" precision to measure their "before" thickness, which was uniformly 0.0200" for each sample. We then plated them at fifteen minute intervals at a closely-monitored 140 mA, that is 70 mA/sq. in.

Here's the rub; every sample, whether plated for fifteen minutes or an hour and a half, has turned out to measure 0.0209". What is cutting off deposition? The current has stayed pretty constant-- within 2 or 3 mA as measured through a multimeter.