Ignitious as Inflammable?

In the extract below of an article the word ignitious has been used to mean flammable. I looked it up in any dictionary I knew (, heritage, oxford, , Longman) and I didn't find such a word described there; however, I found the word ignition witch means the act of starting to burn.

I was wondering that if the usage of the word ignitious instead of inflammable is correct or not? Can you say ignitious material instead of flammable material? And if the answered is positive why I couldn’t find it in any well-known dictionary?


the extract: " In the major part of the production process the powder has a high degree of moisture (about 20 % of water), which makes it substantially not ignitious, and at least very hardly ignitious relative to conventional black powder having a moisture content of maximum 5 %."