# Why does not aqua regia burn filter paper?

We were doing basic radical analysis in lab and we were asked to add aqua regia on the filtered PPT collected on the filter paper and collect the formed solution , my question is if aqua regia can dissolve even gold and platinum why didn't it burned the filter paper(or made holes in it )

• Why would it? There is no "even". There is no universal rank of "strength" for all chemical reagents. HF eats glass, but is indifferent to gold. Aqua regia is the other way around. H2SO4 does neither of that, but would "burn" your paper all right. This is chemistry. – Ivan Neretin Oct 30 '19 at 5:53
• @IvanNeretin Well, there is always our trusty friend $\ce{ClF_3}$ – Stian Yttervik Nov 7 '19 at 11:00