New Da Vinci portrait uncovered

I wonder if there were any other options to reveal the artwork that would still save the text? I know it might not sound all that important erasing a page's worth compared to find a self-portrait, but imagine if a screw up happened.

Maybe he was short on paper and erased the drawing to write something down. Kidding. But what material did he use to draw his portrait? Because if it was ink it would be kind of hard to erase it.

^if you read the article, they say that's what they think actually happened.

I wonder if there were any other options to reveal the artwork that would still save the text? I know it might not sound all that important erasing a page's worth compared to find a self-portrait, but imagine if a screw up happened. The actual document isn't being destroyed They are "digitally erasing" the ink. If you read the article it says that they "enlisted the help of art historians, Carabinieri police forensic experts and graphic artists to tease out more detail from the ghostly image. Over months of micro-pixel work, graphic designers gradually "removed" the text by making it white ins... [More]