How to use `nickel powder` and `lime powder` to paint `faraday cage`?

[youta556]

I try to build `faraday cage` room for RF testing,this job is for shield low frequency RF radiation.
I mix nickel powder,316 stanless steel powder and lime powder,add some water,that's my material of painting.
Before I start painting,I ask for advices here.Any formula of ingredients?Is that enough paint only one time?What will happen if I leave floor unpainted?Anything I should notice based on your experience?

[ahbushnell]

What frequencies?

[youta556]

frequency band is 10hz-10Mhz.

[ahbushnell]

What do you want to shield against?  Electric fields or magnetic?

 

[youta556]

 Electric fields.

[jonpaul]

So called conductive paint has a relatively high resistance per square

A Faraday cage or screen room needs a copper screen with no gaps

Cost to buy or build a one man screen room is 10...100K$

what is your goal?

Jon

[twospoons]

Graphite paint would get you most of the way there, but if you really want to shield down to 10Hz you are going to need sheet metal. Sheet steel would be good enough, and a lot cheaper than copper.  You will need to seal all the seams with conductive foil tape.
And you need to do the floor too.
What are you doing for the door? Any electrical gaps when the door is closed will leak RF.