Advices for starting to do Lith Printing

Is the Sulphuric Acid absolutely necessary? In my perusal of other threads I've come across a formula that eliminates the acid.

scheimfluger_77 said:

Is the Sulphuric Acid absolutely necessary? In my perusal of other threads I've come across a formula that eliminates the acid.

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I've only used the sulphuric formula so I couldn't say. I made a gallon of stock solution and it's lasted a year, still very effective.

Though I realized something kind of stupid - I keep it in a gallon jug that held windshield washer fluid. I hope none of my kids finds it and fills up their reservoir. (Exactly the same blue color...)