This method is a continuation from previous one. In the previous method, we tried to create Nitric acid by just adding ingredients without applying any heat. Now we adding the heat source. 

Now, we making all the reaction, it's seems like a good idea to have nice fume chamber. 

But do we need a full size fume chamber? Absolutely no! Since we start by adding ingredients while they cold and Nitric acid is not formed yet. Furthermore, we will wait until all Nitric acid is evaporated. So, in the beginning and in the ens we don't need fume chamber. We only need ot the middle. 

Let's start from what is fume chamber? I thought it's hermetic box with gloves. It has gloves but it's not hermetic, it takes air from the room and suck it through the fume chamber and extract it using a fan/air-pump outside.

Going back to the main observation, since we don't work with dangerous materials in the end and in the beginning we don't need those fume chamber gloves. 

So what left is just a pipe with a fan that can be opened when needed. 

When assembled it's getting a compact form of 

All the electric together looks like:

Run some tests, was not able to reach more than 170°c. 

Connected heating element and tray in a better way, now we are able to get as high as 195°c 

Simple test, I put IC with a drop of water in it. Look what happened after two minutes of heating:

Now, let's add REAL acid and see what happens. I've gradually started increasing the temperature. At about 195°c (of the hot end, I guess the tray is much cooler) there were bubbles.

This video is 10x faster than normal one. So bubbles formed but in low quantity. It felt disappointing but under microscope it looked in a totally different way

And it was only after 10 minutes. Running it for another 20 minutes gave quite the same result

The next thing will be using Sulfuric acid instead and more effective heat.