Before use mix 10 parts of solution A and one volume of solution B.
exposure time: 1/2 normal time
intensifier solution: 2-5min (for paper A4 is sufficient 75ml )
You can use during at any stage on process
When you use the intensifier solution instead of developer, the result is black color of picture.
When you use the intensifier solution after washing, but before fixing, the result is warm brown color of picture.
When you use the intensifier solution after fixing, the result is brown-black color of picture
For negative 8x10 inch I recommend use 75ml of premixed solution.